subject
stringclasses
4 values
grade
stringclasses
15 values
skill
stringclasses
445 values
pic_choice
bool
2 classes
pic_prob
bool
2 classes
problem
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1.12k
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answer_idx
int64
0
3
math
grade-7
identify-alternate-interior-and-alternate-exterior-angles
false
true
\line{RT} and \line{UW} are parallel lines. Which angles are alternate exterior angles?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAADSCAYAAABw17dKAAAeOElEQVR4nO3de3BU5f3H8c/ZEAJFTCJUSIKSCBSUABu5aNQ2WUvFW2FRW3WKw8KoI5eBDIyaikrogB1sQ+ON2BkLmxkcxMpkR0Sgcknq1IzhFkSjFEoSZUjAyibctyGb3x/82ApJwGbP5uzl/ZrZGTlPcp4vMmf45OE5z9dobW1tFQAAAABT2KwuAAAAAIgmBGwAAADARARsAAAAwEQEbAAAAMBElgZst9utkpKSLpnL7/dr1apVGj9+vPr376+EhAQNGjRITz/9tE6...
[ "\\angle{TSQ} and \\angle{WVX}", "\\angle{TSQ} and \\angle{WVS}", "\\angle{TSQ} and \\angle{RSV}", "\\angle{TSQ} and \\angle{UVX}" ]
null
3
math
grade-8
multiply-polynomials-using-algebra-tiles
false
true
Which multiplication expression does this area model represent?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEFCAYAAADZm5BpAAAYRUlEQVR4nO3dbWxd9X0H8N+91ybGJsEBDImTEogpkBRQiZeujLKHdmmTFlWa0CZWVZp4V6mlqyZe0W0vUZk0qVMV9UHixdauog9ptakbGRbLmpQu0MZpIA8NEENM4zh2wLETO4nte89esGY4OBlx/ubc4/v5vDvH8vn//H3jr/8+59xSlmVZAAAASZTzHgAAABYSBRsAABJqmu1kb/9kDI7V3utZCm/ZknKsu/GKWb8m07mRaXoXzXS4J45O9CVfc3nr6ljXsSH5dQG...
[ "(3x+1)(x+3)", "(3x+2)(2x+3)", "(3x+2)(x+3)", "(3x+1)(2x+3)" ]
null
3
science
grade-8
compare-thermal-energy-transfers
false
true
Two identical aquariums were next to an open window. One aquarium had a plastic cover on it, and the other was uncovered. This table shows how the temperature of each aquarium changed over 1.5hours. During this time, thermal energy was transferred from ____ to ____.
"iVBORw0KGgoAAAANSUhEUgAAAvgAAABfCAYAAACdpLOcAAAmWElEQVR4nO3de1xN+f4/8Fc7Ikno4jKG9kRKdp2OU8o0Lrk74UhJakxjGoYoGSb3QyGZGYdj5nBcvu4jY/o1M2Y67o4iowhhMBMNYVyiTlsXUfv3x5q92e0ua+9dyvZ6Ph49aK3P/rw/a+31WfvdZ33W2kaKaGcFiAxd2F7gy+H13QqiVxv7EZE4C87XdwvoNSep7wYQEREREVHtYYJPRERERGRAmOATERERERkQJvhERERERAaECT4RERERkQFhgk9EREREZECY4BM...
[ "each aquarium . . . the surroundings", "the surroundings . . . each aquarium" ]
null
0
science
grade-5
animal-adaptations-feet-and-limbs
true
true
Golden eagles eat fish, mammals, and other birds. The golden eagle's feet are adapted to grab prey. Which animal's feet are also adapted for grabbing prey?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAAEKCAYAAABnkCFsAAEAAElEQVR4nOydd5xcdbn/399zztSdsr1mN2WTTW8kIYSQQOhNQIqCCCJcQVEQEH6gXi8X4QpI86oRIYiEogjSESSEEiAhpBBCetvsJtlsb9PLKb8/zszszO4GFoxEueed17wyc+r3POfM7PN9vp/n+QrDMAxVVdF1HQsLCwsLCwsLCwuLf08kSUJRFEQymTQs597CwsLCwsLCwsLi3x9JkpAs597CwsLCwsLCwsLiy4Gu60iHuhEWFhYWFhYWFhYWFgcPy8G3sLCwsLC...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA88AAAEKCAYAAAAsMWftAAEAAElEQVR4nOy9d5wcV5X+/b23qjp3T0/O0ihnyZIsW05yTmBMxuRglmTCAgtrs+wuC2bXsMaGXTAGzOvF4AWDF7AxGOcs2ZYVrZxnNJocO4cK9/2junt6RiNbgMG7/Pr5qD/T1ZVu3bpVus85zzlHKKWUZVk4jkMFFVRQQQUVVFBBBRVU8H8TUkp0XUcI8Wo3pYIK/iohK8S5ggoqqKCCCiqooIIK/u/DcRwsy3q1m1FBBX+1kBXiXEEFFVRQQQUVVFBBBX8dqMz...
0
math
grade-1
which-tally-chart-is-correct
true
true
Molly made lunch. She cut some fruit. Which tally chart shows the right number of each fruit?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEOCAYAAACzXGCqAABJDElEQVR4nO3deXTcd33v/+d3mU27ZTteEjl2vCXOQkISSFICWWlDKCYkhALhtnAJEOivJ2k599yTctn6I+nvd0oToBe4v9DL2qQB2gstYLYEA6kdQtJszibvliVrl2akWb/b749xZMszkkbSaBbp9ThHhzPf7fMeSSYvfeb9/XyNIAgCRERERESkLMxqFyAiIiIispgoYIuIiIiIlJECtoiIiIhIGSlgi4iIiIiUkQK2iIiIiEgZKWCLiIiIiJSRAraIiIiISBkpYIu...
null
[ "iVBORw0KGgoAAAANSUhEUgAABDYAAAEOCAYAAABywpcrAAB5rElEQVR4nO3dd5xcdb3/8deZM3VrdtPLhvSQAiQQlKARpCMoFoooRRBQFAtcvD8vegUrelWK14IXuCoqSLNdpApExSxgqCmQTc+mbN+d2TL1nPP7Y5JNJju7O9um7L6fj8c+YM6c8plt2fOe7+f7NRzHcRARERERkWFhGEauSxARGVNcuS5ARERERERERGSwFGyIiIiIiIiISMFSsCEiIiIiIiIiBUvBhoiIiIiIiIgULAUbIiIiIiIiIlKwFGyIiIiIiIiISMF...
0
math
grade-7
make-predictions-with-scatter-plots
false
true
Based on the scatter plot below, which is a better prediction for y when x = 0?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAFhCAYAAABK/t0lAAAgLUlEQVR4nO3db3CV5Z038F8AJRoKR7SSojZH09UIJQlNd8ufWROccbG7MqLbfbBTBKzSRsautrWdvuhu475Yq4OKzFZbdRewszNau6LrM6vYZ2u6fSzYabYJ/inWhj2OFoKjNWBwgwXP88LHdBESQs6dc+ecfD6vOPdlzvUNOp5vrlz3dVfk8/l8AAAAiZiQdgAAACgnCjYAACRIwQYAgAQp2AAAkCAFGwAAEqRgAwBAghRsAABIUNEKdn9/f/T39xdrOgAASEXRCnZ...
[ "1", "9" ]
null
1
math
grade-3
lines-line-segments-and-rays
false
true
What is this?
"iVBORw0KGgoAAAANSUhEUgAAAG4AAABuCAYAAADGWyb7AAADaElEQVR4nO3cT0iTcQDG8WfqXre1lQqOCLRCo2BRRp30ooeG3uatQ9Q8dgkP0rXO5cEg6OhG10APUTIPGWR0ETTaIUqQDJoJKdvcdFPXQfeyzQ1n6vSp53OR/d7fK7+93/fPUJglk8lkIHSqjnoB8ncUjpTCkVI4UgpHSuFIKRwphSOlcKQUjpTCkVI4UgpHSuFIKRwphSOlcKQUjpTCkVI4UgpHSuFIKRwphSOlcKQUjpTCkVI4UgpHSuFIKRwphSOlcKQUjpTCkVI...
[ "line", "line segment", "ray" ]
null
0
math
calculus
determine-continuity-on-an-interval-using-graphs
false
true
Is the function f(x) continuous on the open interval ( – 8, – 3)?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH/CAYAAABtkqoWAAB+B0lEQVR4nO3dfXxU9Z03/M88JTN5nJBAgGASAcWCSRCMChLAxaqrrRVaV9urte12u5fddm177e519d6r7b3but7d7cPetdbt1b16VW272y33aq1opCgIaVADEQIJihghD4Q8DJmZzPOZM+fcf0x+IYEEZpLzyzx93v/wIpn5zi/nnDnzPb/5nu/PpOu6DiIiIiIiMoQ51QMgIiIiIsomTLCJiIiIiAzEBJuIiIiIyEBMsIloir1796K2thb33HMPAODDH/4wnnvuuWk...
[ "yes", "no" ]
null
0
math
grade-1
more-less-and-equally-likely
false
true
On which color is the spinner more likely to land?
"iVBORw0KGgoAAAANSUhEUgAAAc8AAABkCAYAAADg1LuyAAAQ7ElEQVR4nO3de3hTZYIG8Lell/RGTnqhMFAsLStyaYGctKkKXjrseBkFfZ4ZadqCC+qDzu4Mjys38cLOjLuyoKsz7s7s7MiISNPK4w11eRRBRPextCSBpq3cry3sQFty0jYNoSXdP1Rm2KalSc8lKe/vv56TnO/tX+/zfeecL1G9vb29ICIiokGL1joAERFRpGF5EhERBYnlSUREFKQYrQOEwuPpguSWILkkuCQJbkkCAOgFAQZBgGAQIOgFJCUlahuUiIiGpahwfmC...
[ "yellow", "neither; white and yellow are equally likely", "white" ]
null
2
engineer
grade-8
identify-laboratory-tools
true
false
Select the test tube.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAPoAAAD6CAYAAACI7Fo9AABhNUlEQVR4nO2dd5ykVZX3f+feJ1XuMD05wQxpiKIsKoiwuKsiAo4wZMRVcA3Lou7u6yq4KGFXYUFXVwXTqiAwMIjADphIgmlBMgLDBIZhUufuCk+49573j6rqro7TcaZqur6fz0xXPc9TT92nnnuec+65554D1KlTp06dOnXq1KlTp06dOnXq1KlTp06dOnXq1KlTp06dOnXq1KlTp06dOnXq1KlTp06dOtUF7ekGzHRuueWWRtu2G4yx0sw6DSnSZEwKQqQNI0V...
2
math
pre-k
represent-numbers-up-to-10
true
false
Which group has 6 circles?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAARwAAAEcCAYAAAAV9AvgAAAQnklEQVR4nO3dz2tc5d/G8evMr04mM8kkaaINCEUffRZWHwXBr3zdiRDEWnSlkJ1LoX+OIupKEQpdaIO0ILgQhSIuRFT4Pn0Uu2jTNslkJpNJpvPrPIsQGadJk3bO+dz3Ob5fm9qazv255j69cjozPScIwzC81ZH+b0dq9qVeKACIRC6QKlnpyZL0SEEKbt0Nwx+2XI8FIO1enJJy13b2fnKqIP335F4bAUAUmn3pPy1ptSP9746U2ert/Q/KBkDUKtm9bpGk7b6...
1
math
pre-k
circles-squares-and-triangles
true
false
Which shape is a triangle?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAGRElEQVR4nO3dTYtbVRzH8W9mOlOYtlPLDIoLu7E+tBbUaimVLnwD7t1rkYpCFfFFiLQFRZHi3rW+AReC2NGiINbauqkLK7ZoZzqBzEzmuoiHPs1Dknue/uf8vpskXG7yJ3y4kOTek07TNM31FbjahaU+rDUo1bodHdgzCU/MwCPT0Lnea5oLi6nHUiV3bBZ2XOkOHjw6DU/tGihUqm1Lfbi8DH+uwG9dmFhcG2wQMuWzPZMDUwC3+zDRv2uDUj5zplYbmEg7iqo...
2
science
grade-7
identify-ecosystems
true
false
Select the taiga ecosystem. This ecosystem has: long, cold winters and short, cool summers many evergreen trees soil that is poor in nutrients This ecosystem has: a small amount of rain dry, thin soil many different types of organisms This ecosystem has: hot summers and cool winters a medium amount of rain soil that is...
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAp8AAACtCAYAAAD2xRSHAAEAAElEQVR4nOy9ebgtV1nn/1lr1bTHM90p9+YmNwNJOhBiCCBIAGVucEBE0BZQQaWl5acoUWhQmm4aw4MoDSLarcQANo2PtuDTzmKQiAxCTEJCCAEy3NzxnHuGPda01vr9sarq7H3vGW5yQwimvs9zntp7r6raVav2Pvtb7/t+v6/4lzVrL25BR1GjRo0aNWrUqFGjxjcFfQ13DEH0cmtr4lmjRo0aNWrUqFHjm42+BmGttd/qA6lRo0aNGjVq1KjxyIA3+eR/H0m...
2
math
grade-3
open-and-closed-shapes
false
true
Is this shape open or closed?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABkCAYAAAC8REciAAAJkElEQVR4nO3dT2zX933H8VemHuz6jwQ54Ma+5ccBS+HPJUYKUckhJJDbMFpRkAoobQ5rgyfNG6hL1zWbBgrSAs2lXQKpVKtMMbktuOwQKphk94IhknPgF+3y8+oe8CRjZG7sgH9OSpOWkp9/nx8/Px4nBIbvm9tTH72/n+9jd+/evRsAAKAh/qL0AAAA0E4ENgAANNDXSg/woKanqpmr3cxcbf4L/3zr9o1Jksqm/nT3djZzNAAAWPFYq+5gV2dqmTj/m1y5eP1Lo/q...
[ "closed", "open" ]
null
1
math
pre-k
addition-sentences-up-to-10-what-does-the-model-show
false
true
Which addition sentence does the picture show?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABUCAYAAAC4PkCPAAAQ2UlEQVR4nO3dW2wc133H8d/c9r4kJS5pkTRFRpLJWLBExFLgyoCkAkWkB8uwUThIWhhGGiQG/FajRQEVtZO0QPPSAn0yCrR1W9RA0Ac/BAlqIA9pULtyUsROHEatrfuNpERzKYnLvc3OzOnDcCmKoigtNXNmds7vAwSxZXLOfL0G58/ZmVlNCCFARERERESB0KPeASIiIiKiJOGATUREREQUIA7YREREREQB4oBNRERERBQgDthERERERAHigE1EREREFCAO2ERERER...
[ "3+5=8", "2+6=8" ]
null
1
math
algebra-1
identify-linear-functions-from-graphs-and-equations
false
true
The graph shows a function. Is the function linear or nonlinear?
"iVBORw0KGgoAAAANSUhEUgAAAfwAAAH8CAYAAAA0Uh0TAABlVElEQVR4nO39eXRb930m/j/YuK8iJZKiRGqzVkuy5VVbbMeO7bETN1LSyskkrjtuf+NMEmcy53RO2tPJND6Wm542aePamSRtJnb6zUwmPrGdaKFl2ZIlhbRFi5YokdooSqRIkQAJEiD2u+B+fn9AoEWRFAHifgiAel7n6EAEcR+8eS/ufd8N91qEEAJEREQ0q1nTXQARERHJx4ZPRER0E2DDJyIiugmw4RMREd0E2PCJaIz/+3//LxobG0d/1nUdL7zwAkKhUBqrIqJ...
[ "linear", "nonlinear" ]
null
0
math
kindergarten
classify-shapes-by-color
true
false
Which triangle is blue?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAFMElEQVR4nO3dzU4bVxyG8dd8SU2TVt1Q9QLaKouucx29qaJA2YRNPlZE6opIVTZhU74EKUlEIhk1CilGRF1gugAqOxhlxuPThaElEPsYY/7jOfP8VhhvZvEwA6+xp+Ccc7uRVKpJ1USqOwGXNlSQbgxK316Tvh6RCrsfnHtRSfuwELJbX0hDm7Xmg29GpO8/b1YIXFY1kd4eSuVI+rMmDVTqzSeIDL10Y7DZlCS9T6SB5NQTQC+dNBU7aSDdQ0FeEBpMEBpMEBp...
0
math
grade-5
identify-trapezoids
false
true
Is this quadrilateral a trapezoid?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAD7CAYAAABQdOO0AAApR0lEQVR4nO3deXxU9b3/8feZOZNlsrOHfQcDiIhKXaqIKypqq7a39na/vV3sYvW2tFXbuqDVtlp/3W77e9xbb2+X21733fqzgnWjooBCZE+AkBBiyEIyJDMn5/z+mCQnSAiZZGbOLK/nXxMcyFed6Hu+81kMx3EcAQAAAIgLn9cHAAAAADIJARsAAACIIwI2AAAAEEcEbAAAACCOCNgAAABAHBGwAQAAgDgiYAMAAABxRMBGwj38j7A+9e+HVHXA9vooAAAACWewaAa...
[ "yes", "no" ]
null
1
math
algebra-1
identify-functions-vertical-line-test
false
true
Look at this graph: Is this relation a function?
"iVBORw0KGgoAAAANSUhEUgAAAQ4AAAETCAYAAADH+ejgAAAe00lEQVR4nO3de3hU5Z0H8O+ZyVxyHy4hQYiIBjKAhcQEmxCIVN1iRES8bL1Varc827q2K89D63ZXkKuCT0tpRdBnW0q11HYRxEUXpFYrAZMUMSMQSEDkEjEJt8wkk+TMff8Ycs4MBMgJkzlzZr6f5+Ehk8wcXpKT77yXc96fEAgEAiAiUkCndgOISHsYHESkGIODiBRjcBCRYgwO6pEoihBFUe1mUIxicFCPbDYbbDab2s2gGMXgoB5VVVWhurr6sl9fvXo1Kioq0Nj...
[ "yes", "no" ]
null
1
math
pre-k
subtraction-sentences-up-to-10-which-model-matches
true
false
Which picture shows 3 − 1 = 2?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK4AAABKCAYAAAAi2W96AAALQElEQVR4nO2d228c1R2Av3Nmd33HSUwSEQJJIDdR2mAoJla5tFDUW1CK4C0IO72pPFSif0HhsZUq0ceqL04DbwQSUEullhKqipioBcI1jmkSxCUOxnHitde7szNz+rDZ68zuzu7O2Dur80nRem5nfr/M59lzzsw5FkopNWPCxylI2mApNJq2IyZgwIAdvbAxAWImo9TJhdUOS6Pxz13XQGw6lVu4LgG7+nJWazTtRtKGqSW4YMKZFMgFK7dBS6tpZwaMnKMAizZ...
0
math
kindergarten
ordinal-numbers-up-to-tenth
false
true
The first picture is a house. Which picture is fifth? first
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABdCAYAAACfMRFHAAAhtElEQVR4nO3deXgUVb438G8l3Q1ZukNIJgkhLZAMW0gCXiFAdCD3GiKMIquioMMwyJUZ5yIoA+/zvgrEh/s8AwIjXq/iBSfo4IKCMINrgjMwPiagcIlhCcskhmkIidJCOhvp7qTePw7pbL1UVVd1d6p+n+fRB7prOfnCOXWoOnUOx/M8D0IIIYQQQogswoJdAEIIIYQQQtSEOtiEEEIIIYTISLEO9k0Hj2Gf23DnXxtw00GjUAghhBBCiDZI6mAfvOZAwflbXjvOR64...
[ "paw", "house", "dog" ]
null
0
math
precalculus
determine-one-sided-continuity-using-graphs
false
true
Is f(x) continuous from the right at x=1?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH/CAYAAABtkqoWAACQMElEQVR4nOz9eXRU95kn/r9v7Zuk0oIWBBKbEAgkgUDsGDAYb4nbS9x20ul00pl0O5N00pmZnsnp6V/Ot3synsx0kv4mnWTS+XYmdma6OxN3vMTGgLFZLQxCAoQkNiGEFkC7al9uVd37+6OQgsxWJd2PSiW9X+f4+Kiq7lMP91bd+9xPfRZJVVUVRERERESkCV2qEyAiIiIimklYYBMRERERaYgFNhERERGRhlhgE9E4Bw8exIIFC/Dkk08CAD75yU/ijTfeuOtrI5E...
[ "no", "yes" ]
null
0
math
algebra-1
surface-area-and-volume-changes-in-scale
false
true
Look at this cylinder: If the radius and height are doubled, then which of the following statements about its surface area will be true?
"iVBORw0KGgoAAAANSUhEUgAAAMgAAACqCAYAAADoZADPAAATrUlEQVR4nO3df1ST973A8XdALZWSpCu1VAgElQ5ETdwUW+0kKlrtegW6Wu12Crrres7ubMXNntZ7jrfdejfXU11xdT9O167Cna7d1gFuU3svzGCndkg1sSj4o234VeuvGUKrYs3z3D8gqSA8IM0v9fM6h5PkycOTbzRvvkme/NCpqqoihOhVVLgHIEQkk0AiVExMDJWVleEexg1PAgmRX/7yl0ycOJHY2FhMJhPPP/+85voXLlwgJycnRKMTfZFAQmTfvn38+Mc/5sy...
[ "The new surface area will be 2 times the old surface area.", "The new surface area will be 9 times the old surface area.", "The new surface area will be\n1\n4\nof the old surface area.", "The new surface area will be 4 times the old surface area." ]
null
3
math
pre-k
ordinal-numbers-up-to-tenth
false
true
The first picture is a sun. Which picture is second? first
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABdCAYAAACfMRFHAAAo6UlEQVR4nO3de1yUVf4H8M+ZGWSGQUA0VCjvaLYaWGpZgppWuruklanZlpabtmtiXnZL3VJSs4taqZmat+zXVlqW0WqaJoS1tmCgUpaAeUkwSgQZmIGZ4fz+eObK3J65wVy+79erhHluh++L8+U8z3MujHPOQQghhBBCCPEJSWsXgBBCCCGEkFBCDWxCCCGEEEJ8yG8N7GotR/f9VzHgy1pUa6kXCiGEEEIICQ8eNbA/qdAi60eN04Zzzu86nK1vQlGNHo8eq/e4gIQ...
[ "tractor", "sun", "barn" ]
null
2
math
grade-6
which-model-represents-the-ratio
true
false
Which model represents the ratio 2 to 6?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAe4AAABVCAYAAACPbQdUAAANsElEQVR4nO3dbW8bVRYH8P/YGefJTmNn2U2AKpUg3XabVLsJpUkf1FCJwooYiVgg1Dd8kv0+FYgitbCLeAFdUQq0pCtVZfsEWkcsbVZsHhq7wbFjz77wmqYhyXjG987cOf7/3lRR4ztzOGWO75m5dyzHcZyFMvDdGlCoAhsOiIiIyBAdFpCKAyM9wO8SgLWw7jhXV8M+LSIiInJztA/ouLdW/2EoAfy+t17ViYiIyAyFKnDnEfCgDNxdA2KrG/W/YNEmIiIyTyp...
1
math
kindergarten
classify-shapes-by-color
true
false
Which circle is pink?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAGjklEQVR4nO3d+09TZxzH8fdpqQJyDQxQ8DrBzM1Nt2wmu/nDsv26v3fZL7tmickubvOOWZzc1SEUSktbzn547GIMOKDt9+nznM8raaIhxm/Lu+fW03OSNE3TpW2YLUGxDrUUkaZ1JdCfh+leGD8CyVIlTa+v+x5LYnZ1ALrul9xfjh+BC8dchSLNKtbh7iYsbsO9EuTWa+4HikxaqT/vmgLYqEOu/sIPRFqp0VQ1hZzfUSQrFJqYUGhiQqGJCYUmJhSamFBoYkK...
0
math
grade-4
compare-fractions-in-recipes
false
true
Does this recipe call for more salt or black pepper?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAHMCAYAAADvfN8VAAB8QklEQVR4nO3de3zO9f/H8cd17XDtyAxjSIoOkkOsqORUOohCROHbUl9yqPkKX1+ROaaI1Y+aSOWUEBNSOSQpp8WwZs6TMWZmJzvvun5/zK522cbGNRs977ebW67r+lzv9/vz2XQ9P+/r9Xl/DBaLxcIlFosFs9lMdna29Y/RaMTJyQlHR0ccHBwwGAyIiNxqLBYLOTk5ZGdnk5WVhdlsxtHR0frHaDTq/38iIlIshryAbTabycnJISsri6ysLJycnHB1ddUHioj8I1k...
[ "black pepper", "salt" ]
null
1
math
grade-6
identify-trapezoids
false
true
Is this polygon a trapezoid?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAC1CAYAAABlJoioAAAeZklEQVR4nO3deXxU9b3/8feZ5UwSlgAiELYQWYUKBGxtba+2P7dqF3D7WXsvV3pva7Vi3bqp1KXeql2sW2/Va1vXn7aKFpe2Xu2i2FKXQgAFJIisMQIhCQmEmTNnzvf3RyRnBhNJyElmyev5eKCTM5P4Jc7yns98zvdjGWOMAAAAAAQilO0FAAAAAIWEgA0AAAAEiIANAAAABIiADQAAAASIgA0AAAAEiIANAAAABIiADQAAAASIgI1e90K90fS/O/r3N5NqdLO9GgA...
[ "no", "yes" ]
null
0
math
kindergarten
subtraction-sentences-up-to-5-which-model-matches
true
false
Which picture shows 5 − 4 = 1?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAHwAAABKCAYAAAB5PTAOAAAMRElEQVR4nO2ceXAb132Av8VNHAR4CKRBUaJY3bbkI4osxUnddBLHaUapO7E9thXTSuvGaY4mSt1zmrbTsRtn6nYySevaUT0jKZaqiSXblRInityJHEmWTOsWI4WUTVEUwRMgCeLg4tjd/rEEQPECTCwJW9jvH/ItsL/3W3z73r59ewiKoii9CXg3BmEJUgo6NxAmAVxGWGaHGgsIvXFFaR4pdlo688Gd5WC6HFMLN1lghUPdG3RuHMIStEahJwFtMTCMpNQPdNk...
3
math
pre-k
fewer-and-more-compare-by-matching
true
false
Which group has fewer?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAXYAAABeCAYAAAA31j+KAAAFsElEQVR4nO3dv28TZxzH8c/FIWeSgIOKWnWJsiRkAMGQKNkZWoFQUKf+mQVEVQb2AB6QWJyYgbKUCiTi/MJHsZ4OV6s42I7v7ns//Oj9WigFPXdvR/qkKQ4XOOfcu8/S61PpqCd9cQIATJHZQLpUk1bnpR/mpOBd5Nzzw7JvCwBgYeuyNNs+jX/y45x0bSFefQDA9DjqSXsn0l+fpf1TaebwS/wLjDoATKdLtXjDJem4J830vvoFAMB06m/4P06aKfdWAADWGHY...
1
math
grade-1
compare-clocks
false
true
The clocks show when some friends took out the trash yesterday before bed: Who took out the trash latest?
"iVBORw0KGgoAAAANSUhEUgAAAu8AAACZCAYAAACfZ9SkAAAidklEQVR4nO3deXwTdd4H8M8kvVt6ID24WiotUsCCnCogyimLu0WOVYGuKKCiu4KcHqwWHpT1kSrP7nK5gOUoKAsoroAiS9HiiXJDQYFCOVraQg/aJr0yzx+104YkbTKZNJnm8369eDn3/Ih8Jt/85hJEURRBLqn6rS8h7jmt2PbOlZWhtLpKkW35Bvuhy4HZimyLSE2YSyLXw1ySO9E4uwFkQXaxogcipekKy1C4/Yizm0HUtJhLItfDXJKbYfHuosScYmc3oVFlx68...
[ "Mason", "Deb", "Harper" ]
null
2
math
kindergarten
count-sides
true
false
Which shape has 3 sides?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAFq0lEQVR4nO3dX2/TVhjH8SctcMGfTUgT017AtpeAxBvYa51A6g0SEwLGLhgMJBCTQLAiVb0YJU0DxnFsx4l9dmEZwThlWWo/Puf4+7lqiJSeim/zI21IRsYY86YQeZWKzEqRlRHgxE6NRC5si3x/VuTbMyKjNwtjHsZ9Hwshu/yVyKndtL7w3RmRH8/VFQInNStFXs5FDgqRv1KRrXhVX0FkaNOF7bopEZGkFNkqP7oCaFPT1NKIbPV7FAwFoUEFoUEFoUEFoUE...
0
math
kindergarten
count-to-fill-a-ten-frame
false
true
There are 8 triangles on the frame. A full frame has 10 triangles. How many more triangles do you need to make 10?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACQCAYAAAAyRxwtAAALcklEQVR4nO3dy27cRtoG4M9xgPyY2Y0XuYfZzhXkxgMIacAGFCNajBDAgQMbs5EXFiZwk93NU/0LK4fxqdVS8SDW86wsgabqRS36BZv8+Oj7qzYFAPHdt1/PvQQAVuCruRcAAABromADAEBGCjYAAGT00Q2H//rH4znWMZvn1/3//Cy//CWRvz9+EACcyBVsAADISMEGAICMFGwAAMhIwQYAgIwUbAAAyEjBBgCAjBRsAADISMEGAICMFGwAAMhoEQU77VKkXZp7GbO...
[ "9", "6", "2", "3" ]
null
2
math
pre-k
represent-numbers-with-pictures-up-to-5
true
false
Which shows 5?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAOAAAADgCAYAAAAaLWrhAAATBUlEQVR4nO3dSYxdWYKX8e+ce+59L96LOeyIdNjOtDPTWVVO1UTSXaJakEI0jRBdCyQkSrBD3UiwomHDigXqHYvqNYhGQr1osUDqSY1AQl0LeijI7kqSHJ2DXeX0EPPwxnvvOYfFfREOZ9rpisiMOIb8/yQrwi9exHn3hT+dO9vEGOO9Et4fwL6HOiIip8QZmMngWgdWCjD3xjH+aC/1yxL58vnOLLgbg+YvFwr4SrepU0ROx76Hd/twt4T3BmD36uYLik/k9M1...
2
math
grade-2
skip-counting-stories
false
true
Each closet has 2 umbrellas. How many umbrellas are in 5 closets?
"iVBORw0KGgoAAAANSUhEUgAAAVcAAADDCAYAAAA2sVL5AAAlFklEQVR4nO3deXhM1x/H8fdkTySyEkIiIYQkGrHEvsSu1NJYaylK7VKp0mrtqtqKnbaoKg1tfxStLfYtKK2ldoIQa6jEkmRClt8fYZgmEZG5LuP7ep48jTtz534zPfeTk3PPnaPJiL2SgRAvuS2hwwCoP/0rlSsRIndbQodhonYRQghhjF5IuCakgtc/VgQesyIh9UUcUYj8kTYr8ivf4boywZSxV8ye2gC33TMlJkXDoSQNPc5b5PeQQuSLtFnxIuQrXD+4aE6bMxa...
[ "4", "6", "10", "14" ]
null
2
science
grade-2
identify-properties-of-an-object
false
true
Which property matches this object? Select the better answer.
"iVBORw0KGgoAAAANSUhEUgAAAKwAAADcCAYAAADtE0oZAAAqrElEQVR4nO2deZQkR33nPxGZWWd3V0/3TM890oyk0YEkkMQOEmYxQkY2EivDgrjW9mK04IfxPmPE47FrjB88I4N5Qqv1yk+CRcDjkMASCHEIbDHLDGAkdFga3RrNffT09PRZdx4R+0dkVld3V88hjaa6svIzr6arKrMyo6q+9ctf/OIXvxBaaw1Qq9UYHh5menoa3/dJSGg3tm3T19fHypUryWQyAAitta5Wq+zYsYPTTjuNTCaD4zhtbmpCAnieR61WY/fu3Zx11ll...
[ "rough", "hard" ]
null
1
math
grade-1
addition-sentences-using-number-lines-sums-up-to-20
false
true
Which addition sentence does this model show?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABhCAYAAADsidaRAAAWiklEQVR4nO3de1BU590H8O9ykyCwgIJIiiB0xEsIqEREkyimmpibmijVTCZiY0xNO7bacYwxHTHSapom1TdmMrHOhFiD461gTMqr75gATpGLCBp11KgBwQXjgktY7iv7/nHchQUEFg57Lvv9zDC7nN2sv18WPV+efc7zaMxmsxlERERERCQKF6kLICIiIiJSEwZsIhLNJxcBzz3A8/8rdSWDo5Y+iIhIGm5SF0BEylDdCIzwBNx7+LXc0Aq8ng383y3Aw9XRldlHLX0...
[ "5+2=7", "7+2=9", "7+6=13", "5+5=10" ]
null
1
math
grade-2
choose-the-appropriate-measuring-tool
true
false
Which tool help you put the right amount of oregano in a batch of soup?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJYAAACoCAYAAAACcRc/AAAUe0lEQVR4nO2da0xb5/3Hv75gO8EGUyi3cs0F/7esMVsTAluXhGqNW1WNO3UlW14wpVvVTKq0vdgLJqXdu6qbJk2qJq0vpipqtaXptlYl2dpMNFOihoiEtibgLiaBcEnAlJttbHOz/fu/MOfYB5trOMcm/D4SsnzOc+znwIff+T3Pec7zqIiI3HPA7SAwFQZCBIZZM1oVYNIAu7cDBTpA5Z4luuZLdbWYB4kDWYD2VjD6pkgHWDKj1jHMWpkKA64AMDwHdAcBtS8...
0
math
grade-6
similar-and-congruent-figures
false
true
How are these figures related?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAB4CAYAAADIUIXCAAATJ0lEQVR4nO3da2xU953G8Wc8vhYXhhgcwsA42GmyNA3kRgADxgY2wSEsGBtcxzMB0i7SVuquqnY3irTJSt28aF9sW6nVSlUrFhgTEowNoeGSAL5AMA6UBEMSupTrGANxwJisKQO+zL4YbMcUGmwf/J85/n4kv+AY5jyS/eLRn985P0coFAoJAAAAgCViTAcAAAAA7ISCDQAAAFiIgg0AAABYiIINAAAAWIiCDQAAAFiIgg0AAABYiIINAAAAWIiCjUFh27ZtKi4u1g9...
[ "neither similar nor congruent", "similar but not congruent", "congruent" ]
null
0
science
grade-2
identify-animals-with-and-without-backbones
true
false
Select the animal that has a backbone. Hint: Mammals, birds, fish, reptiles, and amphibians all have backbones.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK8AAADMCAYAAAAF8vOBAADQy0lEQVR4nOz9d5QkyX3fi34i0pavau+nx7v1fhdr4C0BEPRGtCIp+57ckfj0rp68rnSla0RRvCRBIxEEKVAEARIgPBbYBbDezu542zPtbXV5k5kR94/MrK7q6Z6dxYI6eucw9sx2VVZmZJhf/OL7syFeKGl9OAUZg78sf1n+pyyVAM7VYLENBRMezofX5V8S7l+W/9lLxoDDqfBzNdi6Lv+ScP+y/P9DienU01vXzJ1uNM0dL+9YhNDbrsgd7hFd3xRaa6SUIML...
1
math
grade-5
identify-rhombuses
false
true
Is this quadrilateral a rhombus?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAADFCAYAAABuBIVpAAAkw0lEQVR4nO3deXBc13Xn8d/rHQ2wsa8EuGmjSMOitcSKYkeySYdaSImkTEmpRKnJ1DBVSWrislMzrjh/Z6pSlUiZmtSkamomU5mZjCnuoihLskmXODFLpLXRFiPZ2iiSIEAs3Whsje5+r9+bPxrsR0jcADTw+gHfz1/vooXmIXkpHBzce47hOI4jAAAAAGUR8DoAAAAAYDEhwQYAAADKiAQbAAAAKKOQ1wEA5fLcc8/p1KlTV31t06ZN2rVr1wJHBAAAliISbCwaO3f...
[ "yes", "no" ]
null
0
math
kindergarten
count-corners
true
false
Which shape has 3 corners?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAACfElEQVR4nO3UPY4UVxiG0a96fgL+nGE5IgKWwJIIvB8ktsQOMCSOGKczMBLjaZWDEpLjofW01T4nqtLVld7g0V3WdV2v7mY+387c7Gfu14Gfdr7MPD2beflo5tfLmeXq+7p+uD72LE7Zm2cz559ut5/fLmdeP94qhJ91s5/5+G3my93MH7czu+v77UBkHNLTs62pmZmv+5nd/l8HcEg/mvp7ndkddwr/F0IjITQSQiMhNBJCIyE0EkIjITQSQiNx/vCr67z/8/f...
1
math
kindergarten
represent-numbers-up-to-20
true
false
Which picture shows 9 circles?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAgIAAABcCAYAAAAcXt1iAAAKk0lEQVR4nO3dvW8b9x3H8Q9F8UlUqCfbkgCnsQ0rtYeglpcgg73bRgYvAZp/Iu7WuHPdbG3+gHZsgHYwkEDOGCAeAmQwUSCAnUqInMSFpCiSKJoUT3wQO1wY+UGk7sjf3e/oe78WWRJ593ufB35xON0l2u12e70urexJT1tSsy0AAPCKGk1IryWlhTFpNi0l1vfb7a/LtpcFAADC9nZBGl3ec7+ZT0u/zbtTAgAAeDU9bUnfVqW1uvTfPWmk3HR/wRAAAMCr77W...
0
math
grade-3
identify-trapezoids
false
true
Is this quadrilateral a trapezoid?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAC3CAYAAAAo7imjAAAcKElEQVR4nO3deXSU9cH28eueDEkIEEgiIhD2NaKgghvuKGpRxGBAZBN8lJZ6xO2pvNqix1J9D/YtKn1cqjyEHUEaXHEvKqBVixiURRAQCEFMSEgI2TPz/pHkl4Q1ydyTe5bv56/f/BpuruOh51zZ5rK8Xq9XAAAAAGzhcjoAAAAAEEoo2AAAAICNKNgAAACAjSjYAAAAgI0o2AAAAICNKNgAAACAjSjYAAAAgI0o2D7akLVNl/9zqr7L3uF0FAAAAAQAi6GZxntz11r...
[ "yes", "no" ]
null
1
science
grade-8
compare-thermal-energy-transfers
false
true
The table shows the same data about how the temperature of each cake changed over 5minutes.
"iVBORw0KGgoAAAANSUhEUgAAAvgAAABfCAYAAACdpLOcAAAi0klEQVR4nO3de1xUdd4H8M8gchEHkIuYiwaLcg1QCYTUICV3nSwSwcsjKJqaPhgXo8JMVkEfs9gAXdb7qkmhmUqrst7QFMSUQCRFV7mUiKWOoozIRWGeP1pmRW4zMDAwfN6vF39wzu+c8/2dc76HL2d+54wA60ZJQaRCB15diTdPf6LqMIi6NeYRkXykizJUHQJRh9NQdQBERERERKQ8LPCJiIiIiNQIC3wiIiIiIjXCAp+IiIiISI2wwCciIiIiUiMs8ImIiIiI1Ag...
[ "Thermal energy was transferred out of both cakes at the same rate.", "Thermal energy was transferred more quickly out of the cake on the plate.", "Thermal energy was transferred more quickly out of the cake in the pan." ]
null
1
math
grade-6
changes-in-mean-median-mode-and-range
false
true
Look at this set of 9 numbers: How would the mode change if the number 79 replaced one of the 63's in the set?
"iVBORw0KGgoAAAANSUhEUgAAAWMAAAAkCAYAAABc6FuBAAAJ3ElEQVR4nO3de1hUdRrA8e8MA8hFHQVBCQ1ERRS8piSJeKl0zUuWpq1Fbma7pFbWbm25bbqWbVu5XtJu1lN5AzXJvCAVoqLiFSEvaGZI8gjeAWUYhoGzfyDzMCrCPp3TnOfp/fzH73fgvLzv+b3DnHPmYFAURQGwVduxVFqpUqpREEIIoRUD4GYw4u3eBA+jqWZMURSlzF5Bub3CtdEJIcTvkLfJE2+TJ6bK6ippxEII4SIWewXuRjeMFmnEQgjhUha7DaO9usrVcQg...
[ "decrease", "no change", "increase" ]
null
2
math
kindergarten
match-analog-and-digital-clocks
true
true
Look at the analog clock: Which digital clock shows the same time?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEJCAYAAACuWVASAABcjUlEQVR4nO3de1yUZfo/8A+IgwJTynBwKHVABQ9MZVjgGaW0LcFKK6Vfe1Lbrd1Ntt1qg622A3Zuob61bdphawMr2RJsSwoFLcCSDg4eQB1GrcFBxtMwCCPK7w92JkbmcM+J4fB5v16+Ymbu53nudObFNfdz3dcV0NnZ2QkiIiIiIvKKQH9PgIiIiIhoIGGATURERETkRQywiYiIiIi8iAE2EREREZEXMcAmIiIiIvKiIH9PgPzvjOkcWts7YGzr6Ppve9d/g4YEIjQ...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA5AAAAEJCAYAAADiusiGAABnoElEQVR4nO3de1zUVf4/8BeIgwKTynBxKGVAhVRGKyrQvKCUbiXYxUppbS+Ku7WWbBfbcKvtot13pX71bcUumy5Y6ZZgW1IYaAmWVDJ4AXUYrUDQUXEYhAHh9wc7E+BczgwzzDC8no8HD+dyzvm8xRkf855zzvv4dHR0dICIiIiIiJzCx8fH3SEQuYyvuwMgIiIiIiKi/oEJJBEREREREQlhAklERERERERCmEASERERERGRECaQREREREREJMTP3QGQ+503XEB...
0
math
calculus
determine-one-sided-continuity-using-graphs
false
true
Is f(x) continuous from the left at x= – 7?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH/CAYAAABtkqoWAAB8SUlEQVR4nO3deXxU9b0+8OfMmS17QhKSEEjY0WACREFBUKxUrbiBWmx/1draxbbWtve2t729bW9rLdeu3lq13i7XpcttpXUFI6Ig0KAEAgQIKDFAFkKWyTrr2X9/xKQEWTJwvpwMed6vl682kzlPPpyTOfPMyZkzkmVZFoiIiIiIyBYupwcgIiIiIjqfsGATEREREdmIBZuIiIiIyEYs2EQ0xPr16zFx4kQsXboUAHDjjTfi+eefP+F9NU3DZZddhrfffvtcjkhERDS...
[ "no", "yes" ]
null
0
math
grade-5
understanding-probability
false
true
If you select a marble without looking, which color are you more likely to pick?
"iVBORw0KGgoAAAANSUhEUgAAARgAAAC7CAYAAAC+cYF4AABUDUlEQVR4nO2de5RU1Z3vP/tUVb+q39AC3WojojxsUQSixtiMJhFMYgScqDgx8ZpMNLm5yVJurhh1xZsFoisTdSaJozcTverNaMYoYOaOmNFEQeIDuGpEeYi8uwG76Xe9z9n7/rHPOXWqH9CP6qpGz3ctrT7vczZ1vvV7fH+/LZRSCh8+fPgYBRj5vgEfPnx8cuETjA8fPkYNPsH48OFj1OATjA8fPkYNPsH48OFj1OATjA8fPkYNPsH48OFj1BDM9w18EiFbu7H2tqL...
[ "black", "pink", "neither; black and pink are equally likely" ]
null
0
science
grade-7
identify-rocks-and-minerals
false
true
Sphalerite has the following properties: pure substance found in nature solid not made by living things fixed crystal structure shiny Is sphalerite a mineral or a rock?
"iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAYAAACtWK6eAADA60lEQVR4nOz9d5hc93nfDX/OOTNnep+d2Z3tFVjsogMkQLBaokQViqKarSiximPnldwSxeV5Ut7EuezEseO4RvJjS4otq1qSVUhJFDtIECBIomOBxfY+Ozu9l9PeP87OIejIJN/HVhxJe1/XXDtY7O7MnPO7f7+7fL/fWzAMw2DHdmzHvq+J/9hvYMd27P9k23GQHduxV7EdB9mxHXsV23GQHduxV7EdB9mxHXsV23GQHduxV7EdB9mxHXsV23GQHduxV7EdB9mxHXs...
[ "mineral", "rock" ]
null
0
math
grade-1
am-or-pm
false
true
Andy's family is going for a bike ride in the afternoon. His father's watch shows: What time is it?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACwCAYAAAA16xkbAAAQoUlEQVR4nO3db2zcd30H8M+dnZbgC6P8aQ7UP9N8m8oK2HkyVSTphEBKNE3TlKhiTJvCg1JEXE20G04nNalwgGEjUh6QSFBpa8raatVibeOJDUoiwKFl7EGiSWWd7KIJOhxGoSVntUls3x6kduxzYt/v7nt3Pfv1ehQ7/v6+Hzd98L6PPr/vN1epVCoBAAAkkW93AQAAsJ4I2AAAkJCADQAACQnYAACQkIANAAAJCdgAAJBQd7sLqNfrr78eo6OjcebMmXjhhRfixz/...
[ "2:00 P.M.", "2:00 A.M." ]
null
0
math
algebra-1
identify-linear-functions-from-tables
false
true
The table shows a function. Is the function linear or nonlinear?
"iVBORw0KGgoAAAANSUhEUgAAAFQAAABeCAYAAAC98DOnAAAIa0lEQVR4nO2cfUiTXR/Hv807l/SmhMJahTNLJacpgoSGobIgkbpdWnMlkilYFEEo1h+zBEnHRO3FWaa2wApfSslE7z8sKULNSDRSyXzJxBd8Y87XuZ3njxvlGVk+XjtLejof8J9ztvP98XHXddh1/Xah+EUN+R34XerkgUEVJpQyTChlmFDKMKGUYUIpw4RSxiyhExMTiImJgUgkwqdPn76bb29vR1BQEDw8PMyJocrnz58RExOD/fv3w8vLC9HR0ejo6KC2Pmehzc3...
[ "nonlinear", "linear" ]
null
0
science
grade-2
classify-rocks-and-minerals-by-color-and-shape
true
false
Select the black mineral.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAYAAACtWK6eAAB4u0lEQVR4nO39WZNl2ZXfif32cIY7+ewR4RGRAxIJJGoAUCCrySqqWdVkN6liS90qkWpNJusXyWRt0idpE78DX2h6bKNRJoqSyO4qNZs1kGiggEogE8ghMmaf3e94pr23Hvbe5557wyMyC5kJZEb6Ajw9/A7nnnvOXntN//VfwjnnuJZruZYrRf6qT+BaruWLLNcKci3X8gK5VpBruZYXyLWCXMu1vECuFeRaruUFcq0g13ItL5BrBbmWa3mBXCvItVzLC+RaQa7...
1
math
grade-1
count-sides-and-corners
true
false
Which shape has 5 sides?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAHt0lEQVR4nO3dy29bRRQG8O/6xtevJNBUbhXRLNIH7Y5ll7BBCFH+Gv4ioqpSF1WFaKkQLOimSFU2WVWlkUiBPCyTxK9cv31ZuIao9JHEM2fOXH+/XZXGmcx8nrHPvT4JkiRJ9nrAZgw0h8AgAdHU5gJgIQSuFYGLERDsdZPkacP1sCjNbi4Ccy/i8T+WI+B6aZxComk1h8DzI2C3B/wWA5nGYPwFhoxMWgjHmQKA1hDIDI99gcikSab6CZBxOxSaFQwaiWDQSAS...
0
math
algebra-1
identify-linear-functions-from-tables
false
true
The table shows a function. Is the function linear or nonlinear?
"iVBORw0KGgoAAAANSUhEUgAAAFsAAACCCAYAAAApB7R+AAAMTklEQVR4nO2dfUxTZxuHfxQFNCJsszpEWJFYqi0ViIRNHEwJsGiIk00tNbDpYE4HbhmMJRPUEJipI5GJsAUCozMgwzETBRKc2WxEM8c+QpybXZACc1YnXy0UESzn/WOxr335WGuf8/CWPVfSP3qf0/t+zpXD4Xz0uYu6xmbOGXCWcU5FXWMzJwCDGkw2RZhsijDZFGGyKcJkU4TJpghvss1mM8rLy7FhwwZIJBJs2LABn376KcxmM18lbeL69euIiYmBXC6fdHl3dzd...
[ "linear", "nonlinear" ]
null
1
math
pre-k
ordinal-numbers-up-to-tenth
false
true
The first picture is a crab. Which picture is seventh? first
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABdCAYAAACfMRFHAAAfyklEQVR4nO3df3AUZZ4/8Hf3zIQkMAkEFEiyKpiQHyKguEncEswJofAExSR+Fdwtia7iVn0FLEHr6/kDbr29Vdn9krhVAqLhtk5g14TdE5S9BLwoW3UJBWdEvgkQ8HCdJLiynCQQIJPp/v7RmclMMj96Zrp7OjPvV9XWLjM9/Tz5bH/6ebr76ecRZFmWQUREREREmhBjXQEiIiIionjCDjYRERERkYZ062B/75Qx7d97cNsnvfjeyVEoRERERJQYIupg/7HbiY0nrgb...
[ "crab", "boat", "bucket" ]
null
1
math
grade-3
reading-schedules
false
true
Look at the following schedule: When does Social Dance class begin?
"iVBORw0KGgoAAAANSUhEUgAAAQcAAAD3CAYAAAAQTpEKAABs9ElEQVR4nO2deVxM+xvHP9MuLVqVVEpSCQkJKbIUFbJUCldc2ZV9d3ER2WXJet3cElPZ96LsS1ESIku2SPu+f39/9JtzO82ZmkqKe96v17w43/08M/PMdzk9H85Av04ELCwsLFUQA4DpDnMbexwsLCxNDJHGHgALC0vThHUOLCwsjLDOgYWFhRHWObCwsDDCOgcWFhZGWOfAwsLCiFhjD4Clfjy69gTR155ATlEGznOHN2hfh1cdQ0ZKJnrYmsJiaI8G7YuJ5Ldfce7...
[ "9:30 A.M.", "4:00 P.M.", "2:15 P.M.", "11:10 A.M." ]
null
1
math
algebra-2
describe-linear-and-exponential-growth-and-decay
false
true
How does f(x) change over the interval from x=6 to x=9?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH/CAYAAABtkqoWAAByV0lEQVR4nO3deXxb5Z0v/o+sxZZ3x3Zsx4kdTMA0wUsCCSQkJRQGmFKYJrQX2mkLlKW0LAHCzPT2dnpvO0ymd0oIe9m3O723U37DUggmDSSQ1CkJMbESO5DFSbzE8SJb1np0Fp3z+yPItZzNSs5jSfbn/U9eln2++uY80tHnPHp0ZDEMwwAREREREZkiLdENEBERERFNJAzYREREREQmYsAmIiIiIjIRAzYRxdiwYQNmzpyJa665BgBw7bXX4s033zzu36qqiosvvhi...
[ "f(x) increases by 3", "f(x) increases by 2", "f(x) increases by a factor of 3", "f(x) increases by 300%" ]
null
0
math
grade-8
identify-similar-triangles
false
true
Are these shapes similar?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAD8CAYAAABNcdMMAABT7UlEQVR4nO3dd1RX9R/H8Sd7qQwFcYsDt6YpThzlyD0TJS00zZFmpqVmWmY5G1a40nLm3iPFMvdOTVTcI/dABAVk8/uDwvi59QuX8Xqc0wHu93Pvfd3TUd5+7meYJSYmJiIiIiIiIiZhbnQAEREREZHMRAW2iIiIiIgJqcAWERERETEhFdgiIiZ069YtcuTIwaVLl1IcnzRpElWqVCE6OtqgZCIiklbMNMlRRMS0unXrRp48eRg5ciQA+/fvp2XLluzYsYNChQoZnE5...
[ "yes", "no" ]
null
1
science
grade-6
identify-how-particle-motion-affects-temperature-and-pressure
false
true
The diagrams below show two pure samples of gas in identical closed, rigid containers. Each colored ball represents one gas particle. Both samples have the same number of particles. Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature?
"iVBORw0KGgoAAAANSUhEUgAAAmwAAAGZCAYAAAA0Im0SAACESElEQVR4nO3de1xUdf4/8NdcGYYZQIaLjOAdxrwr5D1F3ewiWLutqdhtt5Iya9uw/baVSVvbtptUu13VfmVW2m27iFbrJVErMwcF8zbgFXAQlesAMwwz8/n9Mc5xhosMMDfOvJ+PDOZc32dg3rzP+XzO5wgYYwxBrKrqEs6cOYvmZhMEAoG/wyEEACCRSBAbG4f+/fv7OxTCY5T/SCCi/Nc+sb8D8CebzYaKigowZoNUKvV3OIS4qKq6hPj4eEgkEn+HQniI8h8JZJT...
[ "neither; the samples have the same temperature", "sample B", "sample A" ]
null
1
engineer
grade-6
identify-independent-and-dependent-variables
false
true
Hint: An independent variable is a variable whose effect you are investigating. A dependent variable is a variable that you measure. Which of the following was a dependent variable in this experiment? The passage below describes an experiment. Read the passage and think about the variables that are described. Lester's ...
"iVBORw0KGgoAAAANSUhEUgAAAUwAAAFOCAYAAADtpiRUAAEAAElEQVR4nOz96a9l653fh32eaU17OlOdqlt3Iu+9vBy6SfbAVjuyLMuS3IkCyQHiwHAkR3EGxIkU/yeG8iYBAiTvEr9SAEsRJDmypChyD2o22WSTzeGSd55qOHXO2WcPa3qmvPitvetScgAHiEQG0AIOWbfqVJ291nqe3/MbvoP663/9r2f+9fWvr399/evr/4+uv/E3/sbP5edagBf+zUf0fU/OEeccMUb6vicl+e+UAwBKZZRSaA1aa4zVKKVomobtdov3A1VVyL+...
[ "the number of moldy blackberries", "the temperature of the water" ]
null
0
math
grade-3
fractions-of-a-group-denominators-2-3-4-6-8
false
true
What fraction of the shapes are triangles?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACUCAYAAACp1l47AAALsUlEQVR4nO3dv2+Uh/0H8Df2nTl++HTGNpypTbFTrDZDq2xthgzdOnRph0r9Kzp0NmOH4qXeShSiSB2w2PFQdUmKKhhiR0mIQixULBTTlKRFZgmDv4OTCvS1zUHu7nnuuddrTMxzH97TW48Ov4/s7u7uBgAA6IqRog8AAIAqUbABAKCLFGwAAOgiBRsG3I3t93P93rtFnwEAfOOIf+QIg23mnTeSJDd/dTVzJ2cKvgYA8AYbKmLp1krRJwAAUbChMta23suN7feLPgM...
[ "4/6", "3/8", "4/8", "3/4" ]
null
1
math
grade-3
angles-greater-than-less-than-or-equal-to-a-right-angle
false
true
Is this angle greater than, equal to, or less than a right angle?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAAqCAYAAACJFiw+AAAGxklEQVR4nO3dXVBU9x3G8efALoSXsDvBgrHZKKCFMgJLX3RMZgJthF50amA6k4ukFtQmkjajm7RJm844JW0mSduo6LQpNangpKm9aOOmnU5aiYqdCU7SqSxiKUlkETEBGsywiCsGZHuBSxF8ocm+nMXvZ2Yv9uw5e55z9+yZ//mtEQgEAgIAAAAQEnHRDgAAAADMJxRsAAAAIIQo2AAAAEAIzSrYg8eaNTYyFIUoAAAAQOyzzNzQu79RLa/vkSTZc1coPjFZCwpLZU2...
[ "greater than a right angle", "less than a right angle", "equal to a right angle" ]
null
0
math
grade-7
front-side-and-top-view
true
true
If you look at this object from the side, what will you see?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAElCAYAAADeN5VfAABBSElEQVR4nO3de1yUdfo+8GsYGERGBi0FVzmolC6EQFuu5qRYrpmkYsHmiiZgaZiuUPpVWgsoNygtcNVI3UBL2QpaybNuJSFga/3WEZM0MTloC7rRDKICMszvj3GeQA5ymJlnBq73P4vMMzP3LK91Lz7ez31LdDqdDkREREREZBQ2YhdARERERNSTMGATERERERkRAzYRERERkRExYBMRERERGREDthls374d/fv3x6RJk6BSqcQuh4iIiIhMiAHbhFQqFSZNmoTw8HC...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA3gAAAElCAYAAAC24UBOAABG5UlEQVR4nO3df1zV9f3///vhpz+Qgy4VpwKalW8cgm01zZPgauY0f7T0XVObqGWj8i2UfpS9LbF8J5UFTo20Al3JKnWS5o/sh6SozfadR0yWhQmYDXQzjmIieTjfP/Cc/AXy4xxegLfr5bJLdn68zuMM57r3fLweD5PD4XAIAAAAgFuYTCajS8A1zMvoAgAAAAAA7kHAAwAAAIAWgoAHAAAAAC0EAQ8AAAAAWggCXiNYuXKl2rdvr8GDB8tqtRpdDgAAAIAWioD...
0
science
grade-4
read-a-thermometer
false
true
Select the temperature shown by this thermometer.
"iVBORw0KGgoAAAANSUhEUgAAAKkAAAKmCAYAAAA2HL7TAAB+IklEQVR4nO1dd3wURRt+9lIISe4ugJAekJaEUERK6DYsCApIESlipUtTqgVFehMUqWKhN8VG+0ARgUBApYQOUpIA0pNLgpg23x93u9l6t3u3d1l0nt8Px+zNPvvOu+888+7c3CxTtGQ0MXUbAwoKo8JU2gZQULgCDVIKw4MGKYXhQYOUwvCgQUpheNAgpTA8aJBSGB40SCkMD39vks9dtAQ796SUXMzfHxHhldDuycfx2EOtvHlpRezdfwDBwcGoVzupVK7PIis7G68...
[ "37°C", "44°C", "111°C" ]
null
1
math
grade-5
identify-parallelograms
false
true
Is this quadrilateral a parallelogram?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEGCAYAAABfD+LHAAAfJElEQVR4nO3daZRcZ2Hm8efeWnpvtfbFslZrlyzJYDJjYsMk4BiME85kIRljLEvxkjBxIODgcRKGmYSEY0NmIBDsEMfMSWbOzJCACYZADBb2gI0Xbd2txZIla7Wtrbfqrq6u5b7zobp1b5WWXureqltV/98HTrXcSNfGPnr4+623LGOMEQAAAABf2JV+AAAAAKCWMLABAAAAHzGwAQAAAB8xsAEAAAAfMbABAAAAHzGwAQAAAB8xsAEAAAAfMbAxIR/uyuq2XelKPwY...
[ "yes", "no" ]
null
1
math
grade-5
parallel-sides-in-quadrilaterals
false
true
How many pairs of opposite sides are parallel?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAD7CAYAAABQdOO0AAAnjUlEQVR4nO3deZxT9b3/8ffJMsnMZBbEQsEVq4hWxKtoKVC1CEhrXajWhSqoLA5IbW/14tVfa1169Ra1v6rIPgqiInXXn4qAWChSWsCqWAREUFToUKbOkkky2c7vD5icWTIjSyYny+v5l2eS0/k+hqSPd07e5/M1TNM0BQAAACAlHHYvAAAAAMglBGwAAAAghQjYAAAAQAoRsAEAAIAUImADAAAAKUTABgAAAFKIgA0AAACkEAE7h936TEC/fKrB7mUAAADkFYONZnL...
[ "1 pair", "no pairs", "2 pairs" ]
null
0
math
grade-3
parallel-sides-in-quadrilaterals
false
true
How many pairs of opposite sides are parallel?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEOCAYAAACzXGCqAAAkZUlEQVR4nO3daWBU5d3+8WuWzJKEEEBAJAoiJZZFW1RqFSmWB8UoqICIVJAutk+t1q2KKKC4I7Via/F52tq6gyIuYEFFK7VgxSqt8Ej/oYqIUgrIFpLZMjnzfwGZM5PErDNzzsx8P2+YM5mEm2ReXLm4z+92xGKxmAAAAACkhNPqBQAAAAC5hIANAAAApBABGwAAAEghAjYAAACQQgRsAAAAIIUI2AAAAEAKEbABAACAFCJgZ7HP9hia/r/VevadWquXAgAAgMPcVi8...
[ "no pairs", "1 pair", "2 pairs" ]
null
0
math
grade-7
mean-median-mode-and-range-find-the-missing-number
false
true
Amy has the following data: If the mean is 8, which number could s be?
"iVBORw0KGgoAAAANSUhEUgAAAVIAAAAkCAYAAADb2bKHAAAGkElEQVR4nO3da0xUZxrA8f85c2DGAUFkGNiKeEOGkVq3atGuu21qK12IElsT05tJa5rGdjfbbpNN2mTT9Mv2w2YvadptUj9odrfZ2sa2XgKrJsZu1/uFihdgIFIqDKgMIHfmvh8kJKwkjM45ZwZ4ft/mPWfmeXne8z6czHvOGSUajUYBQiEYGYFIBIgihBBiIgqoKthsoGmjTdFoNOofAb8/sX0TQoipxmoFqw20cEiKqBBC3A+/HywaqFJEhRDi/gX8oIbDie6GEEJ...
[ "36", "6" ]
null
1
science
grade-4
predict-heat-flow
true
false
Two solid blocks are heated to the temperatures shown. The blocks are placed so they touch. Which diagram shows the direction heat will flow?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAARwAAAC4CAYAAAAxDlOsAAAaf0lEQVR4nO3deZgV9Z3v8XfV2c/phW56pemmWRswLILBuOEScYyKmjETk0xMruPcudGMs9w8yc1kebwTM3lM4sy9k0xInEnUUbxBk8gACoKobIKCttAIHZql932ht7Mvdf+o06fpBTzSh6rTzff1PHki1dXVv+6q+tSvvvX71VE0TdPaQnDKBwNRiGgIIURKWBXItMB8NxTaQWkLatrBfrObJYSY6q7OAutJn/6PYjtUePQ0EkKIVBiIwgkvtIagxgdqf0T/goS...
1
math
grade-6
quadrants
true
true
Which shape is in Quadrant II?
"iVBORw0KGgoAAAANSUhEUgAAAfkAAAH8CAYAAADSe9ZXAAA4H0lEQVR4nO3de3BT54H+8UeysLENNjYGjIlxQsMlAYcECOES01DCLAlZcmUyTHrJJNtZOtMh0810Jst2O91Mw6bzm7QJTbNbdjuhu822E4ZsGwpZAknAmDrEEMBcA6Q1F2NjwDfZsiRLOr8/WHm5GSTjo6Pz8v3MZCY6ks55eC2dR+eiI49lWZYAAIBxvE4HAAAA9qDkAQAwFCUPAIChKHkAAAxFyQPQb3/7W23fvr3ndiQS0Y9//GMFAgEHUwG4UZQ8YLjVq1dr9er...
null
[ "iVBORw0KGgoAAAANSUhEUgAAApcAAAH8CAYAAACEt4SVAAA+MUlEQVR4nO3df3DU9YH/8dduNolJSEJCgBAMUSs/FCIKivwKlSJzKBZ/Mg5Dfzh6naMzHZye0xmP8zo9p3J2vmOr1HpX7jrSu3rtyWGtFDwEFUJoxIBAgICANgFCQhLya5PN7mZ3P98/0qSEENjA57Of/Wyej5mOt5vN5/O6N5989rXvz2c/H5dhGIYAAEDCcblcdkfAMOS2OwAAAAASB+USAAAApqFcAgAAwDSUSwAAAJiGcglAv/3tb7Vnz56+x6FQSD/+8Y/...
1
science
grade-4
use-evidence-to-classify-mammals-birds-fish-reptiles-and-amphibians
true
false
Mammals are a group of animals with similar traits. The following traits can be used to identify mammals: They feed their offspring milk. They have fur or hair. Observe the animals and read the descriptions. Select the one animal that has all of the mammal traits listed above. Western gorillas have black, gray, or brow...
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAp8AAACmCAYAAACcAuREAAEAAElEQVR4nOy9eZgkV3nl/btLLJmVtVf1olZ3a+vWhiwBEiAkMAgEmH0TAmSDDWIxw2DA2DMwY5uZwdvYLMY2Y8MAwsIw2BgwBmwEWKzGWiwJCbSAoCX13tVVXUtuEXGX748bEVWlBQkBNp8U53ny6eqszMibEVGZJ973PeeIq5a8P3EERhUNGjRo0KBBgwYNGvxUsGLhlh6IZeN9QzwbNGjQoEGDBg0a/LSxYkF47/1/9EIaNGjQoEGDBg0aPDig1/7nox/6fTw...
0
math
grade-3
find-the-next-shape-in-a-pattern
true
true
What shape comes next?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAADhCAYAAAC9ZMGZAAAUdElEQVR4nO3dW2xd55Uf8LX3ufCQokiZTiRLchLNqOOBHV/iiTOeDpwMik7n0ocmaIG5AQWaoi+Z1z4VTdBL0ucWKNALWvRlHpoCLdAUaJuZTNO4TpBmxi0S15fEiiZOYsm6RJQlmrdz2bsPjChpJJEidc7e+3z8/QA/mWd/a33LPvzz4z6bWVmWZQAAAEnI6y4AAAAYHwEfAAASIuADAEBCBHwAAEiIgA8AAAkR8AEAICECPgAAJETABwCAhAj4AACQEAEfAAASIuA...
null
[ "iVBORw0KGgoAAAANSUhEUgAAAz4AAADhCAYAAAAJS2C/AAAaH0lEQVR4nO3dXWxc533n8d95mcPhkBzSlE2KouwoUaNAfpHtWonTrJOi22zb7EXttkDTLlCgKXLj3vaqaILubrLXW2CBbRZddC9ysVmgC9QFuuvWaWqvYrhu3cJWLSmWwrVsi7REmUNJ1JAzc16eXjCiJIvvPOc8Zx5+P4AvbGue5/9//jY5vzlnZjxjjBEAAAAAJ3ieZ7uESvJtFwAAAAAARSP4AAAAAHAewQcAAACA8wg+AAAAAJxH8AEAAADgPIIPAAAAAOc...
0
science
grade-5
predict-heat-flow
true
false
Two solid blocks are heated to the temperatures shown. The blocks are placed so they touch. Which diagram shows the direction heat will flow?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAALgAAAEcCAYAAAB0yX6LAAAaMUlEQVR4nO2de3Acd33AP7t3Zz0tyXHkh+zYTRw/YmI7cVIcQijDQIYCJdM0lJYpU2CAdqYtNM+BkJJAAoUS2wlDCKQdCIFCaAYSmkBxmkBKmwckxE7sPPzExrZsWbJlPc7ySXe72z/21reS7qS70+7db3/7/cxobEsnee/02c/99ne/2zUcx3F6xmDvCAxbkHMQhMiSNGB2ApY3w/xZYPSMOs7zQ/XeLEEIng1tkNwz4v5j4SxY2eLaLwhRZdiCXafg6BjsHgF...
0
math
algebra-1
write-compound-inequalities-from-graphs
false
true
What compound inequality describes this graph?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAApCAYAAAAPgl6QAAAKD0lEQVR4nO3da0yTWR4G8KfItXiBCEjxzqhrjKareANFYf2igwhFjCIkMhqNToy6qNGYjOM46mgcbwQdx0BEMzKOpMDKyowflGJUbKABjLfB3YjFDUSMoFGjbaH7gaGK3AoUTt/2+SUk7Xn58BxOTvrn9H3PkZnNZjMcSFZWFmQyGRISEkRH6RX2w76wH/aF/SAiInvmKjqArVVXV4uOYBPsh31hP+wL+0FERPbM6gLbaDRCp9PhwvULCBsbxhUX6lTm7UycKz4HbZU...
[ "$x<0$ or $x>2$", "$0<x \\leq 2$", "$0<x<2$", "$x<0$ or $x \\geq 2$" ]
null
3
math
grade-1
compare-money-amounts
true
false
Which is more?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAfsAAACYCAYAAADjnECSAAB8+0lEQVR4nOz9d3Sd53WnDV9PO72j9w4QINg7KVES1W3JRXIvslPtOMUlyeTNepM3mTeZePJNvtSZb8aO48hO3OQmqjeSIimxd7AABNH7OQen96d9fxwQluImSqLk0M+1lpYkEuW5f8A5+77vvfdvC6ZpmvMluJKDtA6aiYWFhYWFhcV/YmQBvBJ0uaDGBsJ80TSPpd7ux7KwsLCwsLC4HmzxgTycK/9PnQ163OWdgIWFhYWFhcV/XtI6DGVhrgSXcyCmtPJfWIH...
0
math
grade-7
make-predictions-with-scatter-plots
false
true
Based on the scatter plot below, which is a better prediction for x when y = 23?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAFhCAYAAABK/t0lAAAkPklEQVR4nO3de3CU5f338U8IgU2CsAYb4ibFSA6iDtlkUgcQSxIewQPJAK1WVI4i5VAcYUSHdmyN7Yz8rAiEQaNiS9CZ32hVgsWONTzK1nnaROtOd0FaSAwG3IRAOQQNJMHIPn9YdhpyAOTK3ps779df3Pd1u9/vlRnNh8trrzsqGAwGBQAAAMCIAVY3AAAAANgJARsAAAAwiIANAAAAGETABgAAAAwiYAMAAAAGEbABAAAAgwjYAAAAgEERFbBbW1vV2tpqdRsAAAD...
[ "20", "61" ]
null
1
math
grade-6
similar-and-congruent-figures
false
true
How are these figures related?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAB4CAYAAADIUIXCAAAI4UlEQVR4nO3dT2icZR7A8V+adLtaa6URuq3SJvhnZcGiBupuXbpt0WURlW2sLhW8aXG1KtReCgurUHb3JMVSrx22aDw1B6MXDx4jaEbsrYeFeMmlpbiBPZQYZg8ldWpn8ibpM+/zzsznc2rm0HkgDHx58pv3N9BoNBoBAAAksS73AQAAoJcIbAAASEhgAwBAQgIbAAASEtgAAJCQwAYAgIQENgAAJCSwAQAgIYENAAAJCWwAAEhIYAMAQEICGwAAEhLYAACQkMCGVTh...
[ "similar but not congruent", "congruent", "neither similar nor congruent" ]
null
2
math
grade-3
choose-the-appropriate-measuring-tool
true
false
Which tool would you use to find out how heavy a watermelon is?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJYAAACnCAYAAADzJ6XqAAAiLUlEQVR4nO2deZwU1bn3v1W9zNbTPTP07AvDOggIgrgEEBOiIKIxonjjEnxViF4vmqv5iMtN7tWQqIlbFCTB7VXMIphXI26omBcEVDYTDLIMMA4Ms+89W29V5/5RPb3M9CBLd0831vfzgZ46tZxTVb96zqlT5zyPJIQQdW442A0dCngFOjonjFGCdAOMSoVcM0h1LiG2OQa7WDqnE+dZwXigW1vIN0NZmqY6HZ0TpUOB/V1Q64bybpAdXm2FLiqdUyHdoGkIoFM...
0
math
grade-2
write-subtraction-sentences-to-describe-pictures-up-to-two-digits
false
true
Which subtraction sentence does the picture show?
"iVBORw0KGgoAAAANSUhEUgAAAfQAAADICAYAAAAeGRPoAAArBklEQVR4nO3da5BcdYH38e/py0z3XDO5TW6QkJAIXiKwkBDJUirqKngrwu7WqkB8tHwoVi1Lxad8cBe1dnWrpHS39MWutSyRCOy6uupKyLOouKtRSISEGCAhJGEyScjcr90zfTvnPC+GzEzP9OWc7tOTM2d+3zdWT5/bJ/+Sf3ef06cN27ZtlFJKKTWvC13sA1BKKaVU9WlCV0oppQKQJnSllFIqAEXcLNydGeYPyTMcTZxlcV0zhxOdAGyIL6cpHGNz06VsbrykJgf...
[ "39 − 8 = 31", "40 − 9 = 31", "38 − 9 = 29", "39 − 9 = 30" ]
null
3
technology
grade
logo
false
true
This is (part of) a (former) logo of which computer related brand?
"iVBORw0KGgoAAAANSUhEUgAAASwAAAEsCAYAAAB5fY51AAAscklEQVR4nO3dd5RdV30v8O8+55Zz2/SikUajGY26VWxJxpJxxQUXsE3ABAMJwSuY90LJgvAgWcniURJC8vLiQB5khYDz/DAmJLaxMZaxLcuyiiVZddRmpJnRVE2vt5dz9n5/SDIGVK6se/c+59zfZy0vsCzN/mnune/de59dWC8WCSiiXXc1xv/PN5iq9oupZ98+8d7PfhuTVlZ1Ka7h+fD7MPS5P4RuGK58z7gB51w0PP4UzO8/UZSvrxXlq5Y4zrnYcOQUximsCkf...
[ "Samsung", "Compaq", "Amiga Inc.", "Sharp" ]
null
1
math
grade-2
match-addition-sentences-and-models-sums-to-10
true
false
Which shows 7+1=8?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAagAAABKCAYAAADuScD9AAANJklEQVR4nO3dTYwcZ53H8d/z1Ft39cuMPU4ytokTxZkEx8uSLNo4IeSGwrK8SAgREEIRB25ohaLV7mGPywGJPSC0e0Dc2APLskIIAuGyJ9go2WhXQgrZyC8Y4Zfx+GWcmenXqq56nj3UtD1tt7u7uuvpfsb8PlIU29NV1V+XpX9XV3W10FrrjRg41wYaKZBoEBERzZ0rgJoDrIXAQz4gNiKt395Z9NMiIiK67VQdcM+2s98c9oEnK9n0IiIimrdGCpxuAVdi4Ew...
0
math
grade-4
identify-faces-of-three-dimensional-figures
true
false
Which shape has a square as a face?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAOAAAADgCAYAAAAaLWrhAAASkklEQVR4nO3dW2zb130H8C9F0bLkULZp2WJs3SVLdtLYji9x0rppOrTZHpYVG7DtIeuwAbtgwC7YHoa9DEPf9jZgA1YM2IZ1fmqGDcj6khZDt3YrmnoN1rRwGl8Sy7FsUxJJXSlLpiTu4cfz558USfHy///POfx/P4AgWZbtY4BfnvM/t1+kUCgUUk+BuxvA2g6wXQAR+aQ7AsSjwOk+YPAAEEltFQo3VnU3iyh8rvYD3Xc25BfPHgBmDkk6icgfazvArRzw+Cl...
1
math
grade-5
interpret-bar-graphs
true
true
The transportation company tracked the number of train tickets sold in the past 5 days. Which bar graph shows the same data?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAADdCAYAAACBgQWfAABBNklEQVR4nO3deViVdf7/8efhAIKCIijuC4s7irnhkqKJZO6aODpmOWaZ/krSyZq0ydRMK6fG6WvquJVpjqmVCu7mFuW+JooliIoooLLvcH5/kKdOYKIdQeP1uC6u8dznc9/3+5xD17zOh/f9uQ2jBu0xISJlxpJ1XUq7BBERkT81m9IuQERERETkz0QBW0RERETEihSwRURERESsSAFbRERERMSKFLBFRERERKxIAVtERERExIoUsEVERERErEgBW0RERETEihSwyxi...
null
[ "iVBORw0KGgoAAAANSUhEUgAABPIAAAFtCAYAAACN9kQEAACVCklEQVR4nOzdd1zVZf/H8dfhsEFAVMSF4l64FcWVSs4caZqjYd6ObLnSyu6GNqy76S/LvCtNM7WycuE2S8XcoihucIsKMmWfc35/kKfODa5EDuT7+Xj40HOd63t93+ccSvh4DQNgQURERERECoTFYiE2C46nQYoJcvTdtoiIiPxNjgYoYYQa7lDWGQyokCciIiIiUmBiMy3sSLZ3ChEREfmnCfYCR3uHEBERERH5JzmWlvt7OWeo5ZH7r+giIiIif0eKCY5chQt...
0
math
kindergarten
am-or-pm
false
true
Jim's clock is beeping early in the morning. The clock shows: What time is it?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACwCAYAAAA16xkbAAAQdElEQVR4nO3db2zcd30H8M+dnZbgy0b50xhE20nxprICvjyZKux0mobmaJqmKQEx2EZ4AEUk1UTKcDqpCaqDNmy08qSJBJW2JqztVjXRNp74QG0FJLSMPXA0CdbJLpqgw2EUWnJWm8T27UH+2Wdi3+/ue3e9u9frUZPm+/t+rumDtz/63OeXq1QqlQAAAJLIt7sAAADoJgI2AAAkJGADAEBCAjYAACQkYAMAQEICNgAAJNTf7gLq9dprr8XJkyfj9OnT8fzzz8cPfvC...
[ "5:00 P.M.", "5:00 A.M." ]
null
1
math
grade-8
mean-median-mode-and-range-find-the-missing-number
false
true
Kurt has the following data: If the mean is 9, which number could n be?
"iVBORw0KGgoAAAANSUhEUgAAARkAAAAkCAYAAAC9g07QAAAHNElEQVR4nO3ca1BTZxoH8P85ORATI0SDXFJkQRYUwVpprSN4wV7A6VSdemntuOu2WnbHdW27W0e37e5W2922s629YNttu3Znt1ZdW0UtjpeOFFwVLN6gFhKkEqKsSaByK4SQnOTsB2xqxAXp5D0nZZ7ftzwn8H/mfScPyZsETpIkCQDcPhFOjwteyQcJhBAyeBwAFcdDGzYM4bzQW5MkSeoSe9At9ijbHSFkSNEKamgFNQSPz0sDhhASdE6xB2G8CryTBgwhhBGn6AY...
[ "3", "19" ]
null
0
math
grade-2
find-the-next-shape-in-a-repeating-pattern
true
true
What shape comes next?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAAD1CAYAAAAlI4EUAAAb3ElEQVR4nO3dfZBV9X3H8c+55z4sywJCcBEWfBi0sTOdMZ1qMpmpptM07XRs/nH6R+0/ZibppKPtHz5Uo0IsqE2s/hNtagWF0QQmIZkazGRIManRmkAQXCwhwGZIYQXE3bCs7BP3nnvOr39ceRJY9tw9D7/7u+/XjOMAu+f8+PLZnc89e87vesYYIwAAAABOKOS9AAAAAADJoeADAAAADqHgAwAAAA6h4AMAAAAOoeADAAAADqHgAwAAAA6h4AMAAAAOoeADAAAADqH...
null
[ "iVBORw0KGgoAAAANSUhEUgAAAz4AAAD1CAYAAACRDCAyAAAgmklEQVR4nO3db2wd9Z3v8c/MnD+O49hxmjh/HIdEht2stBKtlrRaaUtXpd3VqssT1AfbPqFSe8UKug8gLN1C0jYBbmFBuirc3t5CAdEWtKVVW6hWdENbCkubNCQ43GyaP1W6weSvTRwTx3bOmTPzuw8OCXHiOJ7j+Xd+5/2S+qCJM/PjyyeH8zkz5zeOMcYIAAAAgBUcx8l6CbnkZr0AAAAAAEgaxQcAAACA9Sg+AAAAAKxH8QEAAABgPYoPAAAAAOtRfAAAAAB...
1
math
precalculus
find-limits-at-vertical-asymptotes-using-graphs
false
true
The graph shows f(x). The dashed line is a vertical asymptote.
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH3CAYAAACBwSh7AAB5f0lEQVR4nO39e3hT150v/r91l2z5hg22Y7CBcAkmmAQCiRMISUMSGto00GGSdtI2nZ5Opye9/to57XT69PymQ3v6bZv2204vmZ7JNOll2ibNrYU4CQnXmBCDAYPNzRgwNsYX2bKs675o7+8fQgaDjSV7bUuy368neYylvd9elqWtz15aey2Trus6iIiIiIhICHOqG0BERERENJmwwCYiIiIiEogFNhERERGRQCywiaaQ7du3Y/bs2Vi/fn2qm0JERDRpmXiRI9HUsXb...
[ "$\\lim _{x \\rightarrow 6^{-}} f(x)=-\\infty$", "$\\lim _{x \\rightarrow 6^{-}} f(x)=\\infty$" ]
null
1
science
grade-5
evaluate-natural-energy-sources
true
false
Below are three examples of using energy from natural resources. Select the use of energy that did not add to air pollution. Hint: Burning a material such as wood, oil, or coal releases chemicals that add to air pollution. The engine on a garbage truck burned natural gas. Many early railway locomotives had engines that...
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAp8AAADOCAYAAAB4pWlzAAEAAElEQVR4nOz9eZgkSX3fj78iIjMr6+z7nOm5d2bvXdgDVgvsArsgIUBIFocFwodAlm2QhYzkxxaPzSPJXyEhGf3QgXgkCyMQNjby14u+CCzYg10WWPa+Zo/ZuWd6+q7uuiszI+L3R2ZVd8/OdM1MzwKS8jVPTVRVVl6R0VXv/MTnEA+uWLsvD0VFSkpKSkpKSkpKyktCVcNzdRCVyNpUeKakpKSkpKSkpLzUVDUIa639QR9ISkpKSkpKSkrKPwyctS/Ezz+7yc3...
0
science
grade-5
identify-magnets-that-attract-or-repel
false
true
Two magnets are placed as shown. Will these magnets attract or repel each other?
"iVBORw0KGgoAAAANSUhEUgAAAdsAAAC6CAYAAADmped/AAAp4UlEQVR4nO3dd3wUZf4H8M/MzvbdJCShJkCoQSIlgIB0laKigCIKKmIDD3u9O/VO7/Q8y8+zd0QBUUGwoSAIFgQRUKooXSBAgJi+vc38/liDQdO2zM4zM9/368VLuFMYNk/m83yfykmSJIHEzR8CDpdFcLRcxNEKEZUeEe6ABG9AgufkD5z8ucsX/bgzbBzsZg42c/Sfv/8A0mw8mtk55DTjkZNpQPtsXuG/JSGEkERwFLZNs+dYBAdLIzhSLuJouYjiiggOl4mo8KT...
[ "repel", "attract" ]
null
0
math
grade-8
apply-addition-subtraction-multiplication-and-division-rules
false
true
The number line shows an unknown number, t. Is 1+ – 4t positive or negative?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAApCAYAAAAPgl6QAAAGXklEQVR4nO3dXWxTdRzG8ecU2429MCZvEgWXKIYsJBswykYw4o2JEhJLwIgXOEKCQlDRG/TCqHEhcgWakUBCFElYCCbDBMULvaBbYtqObjQ2DCVKBTUDJEK2sbUdO150LSzsBWM5/5Z+P1fnnHbJk5xePPnvd/7Hsm3bFgDkkZaWFlmWpQ0bNpiOAodwzwHkk4dMBwCA/+rSpUumI8Bh3HMA+eSeC3YymVQ4HFYwGNTs2bNZRYAjrsd79WnkK536s0un/uxSVfkjqp2...
[ "positive", "negative" ]
null
0
math
grade-2
cubes
true
false
Which shape is a cube?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK4AAACuCAYAAACvDDbuAAAXZUlEQVR4nO2dX2wTV77Hv2n+OcGxzdrOH7BJqGxDdkGZBpa9RNBSgnSblmqh0obtviR0H/b2StvSZXUfgq4apAsrXaksdFfq9qGQPC2bSrfpJht6dQmbFghXWUgcgTbEziUOk2yC/yj+V8fOH+U+TM4kjp0SyIxnxj6fl4TxMD7x+fjM7/zm/MlaXFxcnJoFRiJAaAGYXwSFIjtysoCibMBaCJTkAVlTscXFvqDUxaJQ1s+PNECOM8L9oywP2LGJs5pCkRuhBWD...
1
math
grade-4
compare-fractions-with-like-numerators-or-denominators-using-models
false
true
Which fraction is less?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAC5CAYAAAAS5EjTAAA5xUlEQVR4nO3de3RTZbo/8G8JcAoISUcHAS9tqAwzUGxAlFFamsp4RhhqC6MDjjgtUn5U0aHVIxRUKKgg6JFwFGxdFYLAQGGOLZSLS4UGG5xBwBbazoBDmwTlYs9oE6QWuZjfH2FvktJLLnvvJO33sxZLaZP9viXPWjy8+9nPE+F0Op0gIiIiIiJJdAn2BoiIiIiIOhIm2EREREREEmKCTUREREQkISbYREREREQSYoJ91fDhwxEREdHir2+//TbY26Mw43A4Woyll15...
[ "7/12", "5/12" ]
null
1
math
grade-8
nets-of-three-dimensional-figures
true
true
Which net will make this figure?
"iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAYAAABw4pVUAAAl60lEQVR4nNV9eZxdVZXut9be+5x7bw0ZqZCASUgCGSAMAokIQSY1URygRSBCiCAoIiiTPofWfv1+ar/XrS2i9u/51OcT/UmL2BCaBFqfD2wUIYwqKKBCEiCAYUpVKlVQ9+z3x15r730qQUKmSja/St25zl3fWd+3pn0g773Hbr7mHXQwHnnoITw/sHGkD2WbF4/0AWzr+tsPfQQrf3M/XhgcwLRRY0f6cLZ9+d14/e8zzvMAaj8nHTxvpA9rmxZ5v3tS1kv9/Zg7czY...
null
[ "iVBORw0KGgoAAAANSUhEUgAAASoAAADlCAYAAADk87r6AABJFElEQVR4nO29e5xU1Znv/V1r712XvtNAc1VawQtgpEWUKBgwCYnJmAPqO3GiMbTJyajJJJDMJHgmOQcy78lMMu+ZGTSTMzrjGdqZyTs5OmijCdGQN7RnQMULaRwBDRhauQjNrWluXbe93z/WWrt2Nahcuruqq9f382mqunpX1apdVT+e37Oe9SwBBFhKhiAI2JuG7SfgaA6y9t2xDEFcAdUOXFIBo2IgsEJVUuxNBbzUXexRWCylw8wacIs9CEsh206oyzExuKx...
0
math
pre-k
represent-numbers-with-shapes-up-to-3
true
false
Which group has 3 circles?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK4AAACuCAYAAACvDDbuAAAHJklEQVR4nO3dXWjd9R3H8c85OSdp0iQ1TWvVtLZbcH3QPTDGMvYgpMPpkF0M3S7awXA68FJkuxKRIexiIrsQvJq0yOrFcAMtjjVbO9iGzDAnlrL1YaZZ07SJSZb2JDlJzjnJ34tjwG2d5v97+P/zHe8XiJZyfv/fJ31bk4bEQpIkyURN+kdVmluRGomADadUkLpapDs6pB2tUmFiOUmGK3lfC1i/gW6pdKHa/MGtrdLezc2qgY1mbkU6tyBdrUnnq1Kx0mj+BNF...
0
math
grade-8
compare-linear-functions-tables-graphs-and-equations
false
true
Function A and Function B are linear functions. Which statement is true?
"iVBORw0KGgoAAAANSUhEUgAAAjcAAAGlCAYAAAAGbtd7AABP+klEQVR4nO3dfXxT9d038E+SJk2atrQUWgptocUbRVsoCrSowEARGD4yHnyYMjZl914yHwZuTje8dD5MJ9PtEvVC5rObys0GwnUr120BAaWgTjAoVCUttNSmUBraNM/J7/6jJrbQNknPSU6Sft6vly8kOf2eb8L39+sv53xzjkoIIUBERESUJNRKJ0BEREQkJy5uiIiIKKlwcUNERERJJazFzZAhQ6BSqXr9b//+/VFOM3wvv/wyVCoVysvLY77vDz74IPieXHjhhTH...
[ "The y-value of Function A when x=\n–\n2 is greater than the y-value of Function B when x=\n–\n2.", "The y-value of Function A when x=\n–\n2 is less than the y-value of Function B when x=\n–\n2." ]
null
0
science
grade-2
identify-mammals-birds-fish-reptiles-and-amphibians
true
true
Fish live underwater. They have fins, not limbs. A manta ray is an example of a fish. Select the fish below.
"iVBORw0KGgoAAAANSUhEUgAAAtMAAADMCAYAAACx6y9WAAD0h0lEQVR4nOy9eZwkVZX2/z3n3ojI6uoN6AZsBRGQTUABGRQEBTdwRwFF3HCccdyFUUHn54LOqzOvjvqq6IgbCq4oLjDj4DaDAjoIIu4KgoiIgmy9VGVGxL3n98eJzKqmWRooZUbj8ZNSlRkZceNGZvVzTzznecTMrG1bcs706NGjR48ePXr06NHj9qGqxBiRpmmsJ9I9evTo0aNHjx49etwxqCraE+kePXr06NGjR48ePe44cs7o3T2IHj169OjRo0ePHj3+t6In0z1...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA4IAAADMCAYAAAAmsx3gAAEAAElEQVR4nOz9d7gkV3ntj3/23hU6nJznTI6akWaUhYQSSoDIQQFkGZAw9jUgDNKFC7YvYDA/8L3YhmsMmGiwwBgLC4lgjACBhCQUUZZGo9HkdPI5HSvs8P2junvOKI7QEPyj1/P0M326q6t27a7qqVXvetcSzjmntcZaSxtttNFGG2200UYbbbTxzJBS4nked5bgsCJ0qt/2iNpo48lRNvBIFfYm0OvBqT3Z67JNAttoo4022mijjTbaaOPZwVqL1rpNAtv4nUe...
0
science
grade-6
use-scientific-names-to-classify-organisms
true
true
This organism is a smooth newt. Its scientific name is Lissotriton vulgaris. Select the organism in the same genus as the smooth newt.
"iVBORw0KGgoAAAANSUhEUgAAAvgAAADMCAYAAAAGVtdxAAEAAElEQVR4nOy9d5wlR3nu/63qkybn2dmco8Iq7KIAkpCEfIlCBAMSxoCwycEIW2BfGyzAggv8MDkKTDSShawrYTK2UESstJI2KOyuNu/knE/orvr9UVXdfXZXCYZwRT18htk5p093VXXP6Hnfet7nFVprHYYhSik8PDw8PDw8PDw8PH6/kFKSyWTm7nye3Ht4eHh4eHh4eHj84aCUIgzDOTuf9OTew8PDw8PDw8PD4w+LueTkcs7O5OHh4eHh4eHh4eHxB4cn+B4eHh4...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA6IAAADMCAYAAABp7h4wAAEAAElEQVR4nOydeZxdRZn3v0/Vub0l6c6ekJCQlbCHJciigIDM4Ia4jAqOo+K4o444LzqbDuogr/o6476hg9sIIoPC4IK4gIAQCJCEfcm+71unl3tP1fvHU1Xn3O7OpnEZPY+fNt33nntOnao6l/rV7/f8HvHe+0ajgXOOKqqooooqqqiiiiqqqOL3G8YYsiw7aOcTkYN2riqq+F2FqUBoFVVUUUUVVVRRRRVV/OHCOUej0fhDN6OKKn6vkVUgtIoqqqiiiiqqqKK...
0
science
grade-3
identify-plants-and-animals
true
false
Select the plant.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK8AAADeCAYAAABL7FARAAEAAElEQVR4nOz9WZCtaXaehz3f9A97zjnPWFWn5qGru3pA9YCeCGISSBCgKBEOiZZF0w4rFDYdthymwtKFww5f0OGgrmTJFwrSDomUIIAQCYIg2AC7MTS6u7q7qrrm4dSZT548Oezc0z99ky++faooRTuig3UjR+CPqDqZ++TJ3Ln3+te31vu+613ipVmMT/ZhqPiz68+u/1FeCw/vrOCggw0NPz1Jj8s/C9w/u/7Hfg0VPNlPHy/9R4/LPwvcP7v+/+F6EKc2fvS...
1
math
pre-k
represent-numbers-up-to-10
true
false
Which group has 6 stars?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAARwAAAEcCAYAAAAV9AvgAAAMq0lEQVR4nO3dsW9T9xqH8W+gNVKvIQxWb5GHUpTcSyY7C52sRCoLlqrGlVJ5S8QfELO2DG0nRqwmc2PWComkVdMxpmFi4TClvUHBHSBc1YObuEjmFvkOll07OU7OcU5eY5/ns0AEPv4tPPJL8p4zUq/X6y9eSU9eSnuvpb/qAoBAvDUinT0tjb8j/TMijbyo1esPd/t9LADD7sNz0ltbLxtfXIhI//5Ho0YAEIS919Kvf0o7r6T/vJRO7f7V+ANiAyBoZ0832iJ...
1