subject
stringclasses
4 values
grade
stringclasses
15 values
skill
stringclasses
445 values
pic_choice
bool
2 classes
pic_prob
bool
2 classes
problem
stringlengths
0
1.12k
problem_pic
unknown
choices
listlengths
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4
choices_pic
listlengths
2
4
answer_idx
int64
0
3
science
grade-2
predict-heat-flow
true
false
Two solid blocks are at different temperatures. The blocks are touching. Which picture shows how heat will move?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAARwAAAC4CAYAAAAxDlOsAAAV5UlEQVR4nO3dfXRU9Z3H8fedySQzeYAkBIhIAB8AQQRUxKeq1KW2VtFq60Pbtbun7Xbb7vHsOe2pdavdum7brdruOdtu29221m21Vq3VCipqsfgAUpGnIMjzs0KABEKSyTzP3T9+Mwl5AAZmcu+d5PM6J2cyv7kz80vuzOfe+72/34xl27bdFIetndCegqSNiEhBlFhQ5YeJ5TC6FKymmG0vb3O7WyIy2F08DEq2dJorp5XC5AqTRiIihdCegk1h2BeHzZ3ga0u...
1
math
algebra-1
perimeter-and-area-changes-in-scale
false
true
Look at this square: If the side lengths are tripled, then which of the following statements about its area will be true?
"iVBORw0KGgoAAAANSUhEUgAAABgAAAAOCAYAAAA1+Nx+AAABbUlEQVR4nN2UrYoCcRTFjyMyBtEZtMsURaPCmP0oWn0BmScQRMw2g1hsWnyDAcU4MCAYDSYnaNAwWAwG+ePX2SC4bFjXMJY97V6498c9B66PJPFBSZ9c/gRsNhtUKhWEw2EkEgkMh0PvCEIIJpNJttttHo9H2rZNVVU5mUzohTCbzRiJRHi73Z7NVqvFarX661A0GmWj0WAqlaKiKDQMg6ZpUtd1hkIhFotFHg4HkqR0Op3g9/shSd9xpNNprNfrl5e7rovpdIrFYoH...
[ "The new area will be 3 times the old area.", "The new area will be 9 times the old area.", "The new area will be\n1\n4\nof the old area.", "The new area will be 4 times the old area." ]
null
1
math
grade-8
changes-in-mean-median-mode-and-range
false
true
Look at this set of 9 numbers: How would the mode change if the number 36 replaced one of the 46's in the set?
"iVBORw0KGgoAAAANSUhEUgAAAWMAAAAkCAYAAABc6FuBAAAHEUlEQVR4nO3dXUxb5xnA8f/xB8bYGCcESmKSkDpAAvliG92WLCndqk3qpm6KtjZKt11smpabacrtpElVNu1D3ZSrrdK2atIuKrR2U6tWTdema9MyFVqFUJqErxA+4gDhI4EAAdvYZxcOBguSHsrxOa/V53fHe154Hz/Py2Obc3zQdF3XAVgAfR5IAqkRIYQQ2aABDtDyAdfdIV3XdX0eiNoYmBBCfFZ5Uk3ZwQLSiIUQwi5RYAEcujRiIYSwlR4FBwm7wxBCiM+4BDj...
[ "decrease", "increase", "no change" ]
null
0
science
grade-3
compare-properties-of-objects
false
true
Which property do these three objects have in common? Select the best answer.
"iVBORw0KGgoAAAANSUhEUgAAAvgAAADQCAYAAAByQhWRAADxHElEQVR4nOz9d5glZ33n/b8r18mhT3efzmmSRhqNck4gogBhcjIY8GLvYvyz/fjxY2N7bQM2tuxdvF4DNmBsgw0IDCIYkEEoZ81II00OPZ3jybly1e+PVgSFmVEYSV2v6+pLo5nTVXd1VXd/zl3f+t5CEAQBgGmaLC8v02g0cF2XUOhkk2WZZDJJX18fuq4/r/sKr//Qi014/YfWsxfy+g+FXo6EIAgCwzA4evQoIyMj6LqOoigne1yhEI7jYJomMzMzbNy48Xn7IR9...
[ "hard", "bouncy", "colorful" ]
null
2
math
grade-7
classify-quadrilaterals
false
true
What name best describes this shape?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACyCAYAAAB4I7gQAAAaHklEQVR4nO3de3CUdZ7v8c/T16Q7CRQZyO5ssoMEZ5bLlGQUxEEPcEZXB+RwqQWOA+xwU3SmcEcrC7XD1CJV4impHGWgSkW5WYgWUMWlkCzW0TLZxSMXKXuqEHQkiJvMzgQGJiTpDn199o9nAgkjkEB3nu5+3q9/tGjQb4x/fPJ7Ps/va5imaQoAAABAWrjsHgAAAADIJwRsAAAAII0I2AAAAEAaEbABAACANCJgAwAAAGlEwAYAAADSiIANAAAApBEBGwAAAEgjj90...
[ "quadrilateral", "trapezoid", "square", "parallelogram" ]
null
3
math
grade-1
compare-sides-and-corners
true
false
Which shape has fewer sides?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAALgAAAC4CAYAAABQMybHAAAH4ElEQVR4nO2dbW7bZhpFL0WJsim3TQIkkwBtghhJ01lBN9HNdDezpm5gmg+4SFognhaTBIlFW5Qozg9JhdxmnFgiRT333vPP8J/H4uGr81IindR1XZ+WwIsC+FABsxrGhKWfAF+kwOMc+EcGJKeTuv7pfddjGdM8338J9J8Xix/uZcCT0cJ+Y6LyoQKejoHXJfCsAHrvZ4tfWG7DwBfpwmUAOKuAXrX2C2MYWLk8rYFet6MY0y4W3FBjwQ01FtxQY8ENNRbcUGP...
1
math
grade-5
points-lines-line-segments-rays-and-angles
false
true
What is this?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACCCAYAAAB8Wb+9AAAQQElEQVR4nO3df2zUdZ7H8dd35tt2Smem7QyCHF2gYC7SRcWNhuqBKVZ6/qFnokZNzGIwPRKzazB3Yffci2uICTkjudisxETrNuKaA87df1D/cC1Uj6PTaIR4pnB7WsrddBeEmQ7Tlk47P773x3Ra+hOk037nx/ORDMN0aHlDp82rn7y+n49hWZYlAAAAAFnhsHsAAAAAoJAQsAEAAIAsImADAAAAWUTABgAAALLInPqG9YfOKzyclN/l0IOrXNq83KVH15XbMRsAAAC...
[ "a ray", "a line segment", "a line", "an angle" ]
null
3
math
grade-2
write-subtraction-sentences-to-describe-pictures-up-to-two-digits
false
true
Which subtraction sentence does the picture show?
"iVBORw0KGgoAAAANSUhEUgAAAfQAAAEsCAYAAAA1u0HIAAA/DklEQVR4nO3dabAdd2Hn/W93n+3uuxZrl2UbKSyS/chIgfEMjs2wDIzBjssVhkHwwLygSCqM/YpUeKAqRd6YKgcSqMoEoQzjCRibEIqSjZfCLhNZXtBqy7aWK9nyXXWXs96zdvfz4lh3O1ufDd3l96lyWef0Of/ur1TV/3tPL8dwXddFREREljXzWm+AiIiI1E8TuoiIyAqgCV1ERGQF0IQuIiKyAmhCFxERWQF8zRjUnXw+/9/E82DHoW0H5oZ7Mfo+DL6OZqyyKdS...
[ "53 − 8 = 45", "54 − 8 = 46", "52 − 7 = 45", "53 − 7 = 46" ]
null
0
math
grade-3
compare-fractions-in-recipes
false
true
Does this recipe call for more green peppers or artichokes?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAHMCAYAAADvfN8VAABvWklEQVR4nO3df3zN9f//8ds5+23GzI9h8iM/ihjlfBBifqX8KDE/EiWKePtVxtsXZflRKr/qvWSRtyj50dtbpZRS0sqvYRgRMozNbDYb9uvsnO8fs/M2+2HjHJu6Xy+XXd7vc17P83w+X2e6nPt57vF6vgxWq9XKNVarFYvFgtlstv0YjUZcXFxwdnbGyckJg8GAiNw9rFYrWVlZmM1mMjMzsVgsODs7236MRqP+uxYREbEjQ07AtlgsZGVlkZmZSWZmJi4uLnh4eOi...
[ "artichokes", "green peppers" ]
null
0
math
grade-1
count-sides-and-corners
true
false
Which shape has 4 corners?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAHW0lEQVR4nO2dz24TVxTGv7E9ibHjPxSrVcWGULUNXWRRgZJVg0TLIiyygDVPwBN0xapPwBN0RSUegUXXSCwqgQqNaRAShAaJVDY4OMSZLgxtVCjN3Dn33nPvfL8disZzmfvznDvfjOckWZZlT3eB/ggYToC9DIQUppYArSrweQP4ZAZIno6z7NbA97BIzCy1gdr6aPqPT2eAL5tTCwkpynAC3H8JbO4Cv42AymBv+gdKRiRpVadOAcCLCVCZHPgDIZK8dep1BlT...
1
math
grade-2
write-subtraction-sentences-to-describe-pictures-up-to-18
false
true
Which subtraction sentence does the picture show?
"iVBORw0KGgoAAAANSUhEUgAAAfQAAABkCAYAAABwx8J9AAAaw0lEQVR4nO2deXAc152Yv54BBseAAAWQ4AESokiCkCXesijClGxrpVV0mZJI2rtrqmJ6nfI6m60clc2xOXaVSv7YVO3mr2ytnaQ2rNqlvOuIspbxMrESJ7ZCmSIJkeAhQQAoEABBEPc5A8zR0y9/NGYwg+kZzD2D5u+rYhHTx+v3oX+N35vXr19rSimFIAiCIAirGkexKyAIgiAIQvZIQhcEQRAEGyAJXRAEQRBsgCR0QRAEQbCg+/adYlchjmR1KitgPQRBEARhVXD...
[ "17 − 8 = 9", "18 − 9 = 9", "16 − 9 = 7", "17 − 9 = 8" ]
null
1
math
grade-2
place-value-up-to-hundreds
false
true
What is the value of the underlined digit?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAAiCAYAAABlRa5TAAAFY0lEQVR4nO3dTUhUaxzH8d85WVGYTUVEBcGUYongGBVZGJiL0MBsNYYJuZESoSIIJCgQkkJaRC4qWoRUIr1JkMaQYfayyLJ8oQZb9EJCyCCiQVnJuQtvz/Uw3Us4Jzpevp/V8zzn/ztnln8Oz5zHchzHEQAAAABP2H/6BwAAAAD/JzTYAAAAgIdosAEAAAAP0WADAAAAHqLBBgAAADxEgw0AAAB4iAYbAAAA8BANNgAAAOAhV4P97t07VVRUKBQKKTk5WatWrVJRUZH...
[ "9", "90", "900" ]
null
1
math
grade-7
interpret-circle-graphs
false
true
Mabel recently emptied her coin jar and counted the coins. Which list is arranged from the most common coin to the least common coin?
"iVBORw0KGgoAAAANSUhEUgAAAZYAAAFdCAYAAAAg10vhAABf4ElEQVR4nO3dd3zM9x/A8deN7EWWICESkdi7NdtSFFVKW7S6q4uW1PjpoEaXaimqLdVd3UNLl6JGVW1ixwhiJLJkz7v7/P44rkJCEpfcXfJ+Ph5aue/3Pt/3N4nv+z5bo5RSCCGEEFaitXUAQgghqhdJLEIIIaxKEosQQgirksQihBDCqiSxCJszGAzExsZeUxmnTp0iIyPDShEJIa6FJBZxzZYtW0avXr3w8/OjWbNmREdHk5WVVeb333///URFRfHee+9V6PqxsbE...
[ "copper coins, gold coins, silver coins", "gold coins, copper coins, silver coins", "gold coins, silver coins, copper coins", "silver coins, gold coins, copper coins" ]
null
1
technology
grade
icons
false
true
This is a(n old) logo of which famous app or program?
"iVBORw0KGgoAAAANSUhEUgAAATYAAAEsCAYAAABJ8Z9UAAAfAklEQVR4nO3de3RV1Z0H8O815+bmRXiJpBgISUBIkEAgICD4AKs4gqvWR9XaWlodW6ejbZfYqdrVjuOqtp2hUhkWfYzaLrAOijjFB1pFEQWBQCRgACXEREBiwBDI674888e+J+Rxk/s6e59zz/1+1mKtvM/hhvtl/+5+/Fy7dtaAiMhJNKtvIFF+v0833vZ2doiPeX2Ar92yeyJKGulZAAC3Jx0A4MnIFO+7012W3ZMJkirY/H6f3tT4GeoPHsDBfdX4/PAhHDl2FGd...
[ "Shazam", "Microsoft Office OneDrive", "Adobe Illustrator", "OneDisk" ]
null
2
math
algebra-1
interpret-a-scatter-plot
false
true
Does this scatter plot show a positive trend, a negative trend, or no trend?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAFhCAYAAABK/t0lAAAiyUlEQVR4nO3dfXCU1cH+8SuAmECQNCm6kLSuk92CTCEbgzSImKV2KkGjAWq1UiVYEfEFRNpBO89Po4LFTltABJX6CL7QMi1SLB3AxymEUgdi2Wapb9gssmgWFhRYJBCMhP394Zia5sWQPXvfu5vvZ6Yz3PfJ5lw0zOzlydlzp0Wj0agAAAAAGNHD7gAAAABAKqFgAwAAAAZRsAEAAACDKNgAAACAQRRsAAAAwCAKNgAAAGAQBRsAAAAwyLKCferUKZ06dcqq6QAAAAB...
[ "negative trend", "no trend", "positive trend" ]
null
1
math
algebra-1
interpret-a-scatter-plot
false
true
Does this scatter plot show a positive trend, a negative trend, or no trend?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAFhCAYAAABK/t0lAAAk1klEQVR4nO3dfXCU1f338U8CYhI3kICx2V2xgQVDoQ6BXVqE/kLCr0qpBNDe1t62o9BCCZ3Wmna0tDOlqQ+d1GrBVjHYW0UbWtumtipjcbAYQIanLIZp1YTysIAbwkPNyoYkwMLef1C2hpBA5GSvzbXv11/sOWu+3wOO++F49lwp0Wg0KgAAAABGpFrdAAAAAGAnBGwAAADAIAI2AAAAYBABGwAAADCIgA0AAAAYRMAGAAAADCJgAwAAAAYlVMBub29Xe3u71W0AAAA...
[ "positive trend", "negative trend", "no trend" ]
null
2
science
grade-4
animal-adaptations-feet-and-limbs
true
true
Red-eyed tree frogs live in the rain forests of Central America. They spend most of their lives in trees. The feet of the tree frog are adapted to stick to the smooth surfaces of leaves. Which animal's feet are also adapted for sticking to smooth surfaces?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAAEKCAYAAABnkCFsAAEAAElEQVR4nOydd5wdVfn/3+ecmTu37L3bN9lN74EkECD0JlWaATSCgAVQUBELKIr6taKCoqAgIkWlK6IUqdJ7JyEhjSSk7mZ7u33aOb8/ZrNfggECBOXr777z2tcr9045z8ydM/PMcz7Pc4QxxgRBgNaaChUqVKhQoUKFChUq/N9ESollWQjf903Fua9QoUKFChUqVKhQ4f8+UkpkxbmvUKFChQoVKlSoUOG/A6018j9tRIUKFSpUqFChQoUKFbYdFQe/QoUKFSpUqFC...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA88AAAEKCAYAAAAsMWftAAEAAElEQVR4nOz9ebhsV1ngj3/WWnusuU6d+c5j5omEMAQDAUQZGpCOIiAqqNgi7SxN99M/QVGJoqDSqCitzILYDM6GEJAZQhIyTzd3PvM5Ndee11q/Pyq5nUAgNxCG9luf5znPc2rXrr3eXXu/q9a730lYa21RFBhjmDBhwoQJEyZMmDBhwv+bSClxHAchxHdblAkT/kMiJ4bzhAkTJkyYMGHChAn/72OMoSiK77YYEyb8h0VODOcJEyZMmDBhwoQJE/5jMFnbT5j...
0
math
pre-k
different
true
false
Which is different?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAHwAAAB8CAYAAACrHtS+AAAFiklEQVR4nO3cS2xUVRzH8e85987Yx7QVoS0NWDVq0UiMAZOKETeocaVLXRjxEdlpws4NMZqgrkzcqBhcoAmJG1YuJSYaF7BBk0bCIwgi6QMKYfqeufceFwMGRNspzsy5Z/7/z4qmZc4v850pw0w7xjnnJipweh5mUkgcqo3EBnoieLALBotgJpacO1r2PUu1wmgvxKfmax8MFWFTd+3WoNrHTAon5mC8AifnwZaT2ic0dnvqiWptAWZTsOkNn1Dt6XrbqgPrd4p...
2
science
grade-4
identify-magnets-that-attract-or-repel
false
true
Two magnets are placed as shown. Will these magnets attract or repel each other?
"iVBORw0KGgoAAAANSUhEUgAAAe0AAABBCAYAAAD8HfzaAAAG1ElEQVR4nO3df2zcdR3H8dfd9Xr9db277sd1k64rbM5ZZNGEdo79QJ3T0ayJogsOokwckYRExURZNCQu0y2GiGiIEP5gyAgZI6NBAkMTa4XgoMCcP9iPaN3aqFu3tnfrtb273ve+/tE5oolbYz/3/fZzfT7+6T/f9vNOPr08e3ef+zZQ+cgGN18sCOXh8Ds/0tLcIr/HgCFNOxeq5vqI32MAmCWCrly/Z4BBgUDA7xFgFI9PAO8J+j0AAACYHqINAIAliDYAAJYg2gA...
[ "attract", "repel" ]
null
1
math
grade-1
find-the-next-shape-in-a-growing-pattern
true
true
What shape comes next?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAADhCAYAAAC9ZMGZAAAaN0lEQVR4nO3d25McZ33G8ad7emZnz9I4Xh1Wlh0vUsqyY2GMLcAHbCoxFRKgilAVUgUXXIQquAhV5IYLqFSAi/wL4YaL+BaqSFEGXAlHq4wJBmQsi0hekHdXsg5oVlrtcfqUi/FIq9XuamanD2+//f1Uucq1O9P9/t63e/T0u+90O3EcxwIAAABgBTfvBgAAAABIDgEfAAAAsAgBHwAAALAIAR8AAACwCAEfAAAAsAgBHwAAALAIAR8AAACwCAEfAAAAsAgBHwAAALA...
null
[ "iVBORw0KGgoAAAANSUhEUgAAAz4AAADhCAYAAAAJS2C/AAAfOUlEQVR4nO3d228c553m8aeqq5tk86j2mpJMWtaYIw58GGkcx5InljOSsatgPJMJ4Akws4BzkYsJMLlIgNkbXyRYbJKL/Aubm7kY3TpAFoESG7ueHOSx5Y1jS7GsWckcyxJJU5TV1Imkuo570aZEiQd1s+v49vcDGLBI9lvv732ruvvpervKiqIoEgAAAAAjWJaVdRdyyc66AwAAAACQNIIPAAAAAOMRfAAAAAAYj+ADAAAAwHgEHwAAAADGI/gAAAAAMB7BBwA...
1
math
grade-1
cubes-and-rectangular-prisms
true
false
Which shape is a cube?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK4AAACuCAYAAACvDDbuAAAR2ElEQVR4nO2dXXAb13XH/xffBECCHxJJiRY/LIm0JJuchmosO4n8kTZxM3E8ncaZjts4fXHtlzxUU+eh0xm1bmf6EE/Vl87EHT/ZbcYz1UuZ8UNUJ5aU1JI9omOSdmSKkilpSJpfIAmAAAksgNuHBXYXICFR1N3du9jz04wBLC7uHgN/3r3nnHvPMs45n88B1zNAqgDkOQhCOnwMaPQCh8NARwBg81nOP0rabRZB7JxHmwDfVEZ9sS8ADERUVROEbKQKwGQa+DI...
0
math
grade-3
correct-amount-of-change
false
true
You pay $3.16 to buy a slice of blueberry pie costing $2.43. You receive the following change:Is this the correct amount of change?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACSCAYAAAB/j70mAACqgklEQVR4nOzdd5yc9XXo/8/Tptfd2d53pVXvXSAkhBA2BuNugwsuyU0cO3bKTeLc5MaOc1NuEie/9JvrGzsusQ0G2xQDEkUIhFDvZSWttvfdmdnpzzz198dKY4jtWGABTvx9v168AGlm9jnP7B9nzpzvOZLrui6CIAiCIAiCIFwX8ht9AYIgCIIgCILwX4lIsAVBEARBEAThOhIJtiAIgiAIgiBcRyLBFgRBEARBEITrSH2jL0CYY+olCoUC5bJOqVDAMsoUU5MYtou...
[ "no", "yes" ]
null
1
math
grade-4
acute-obtuse-and-right-triangles
false
true
What kind of triangle is this?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACqCAYAAACXpjjmAAAXzklEQVR4nO3df1TVdZ7H8dflAiEiDpJIlC07IaCR5ewwy6E2ppVpG2Zbs6KxsBkxG0taw34I5o9K16M19nuaaXQc1HFbw3GVGyU/1A1XOYutuHpOtlaWP/hhKAmE/Lxw948WcpqmQC98vl/u8/GXR4/c1/Gvl+/zfn+uw+PxeAQAAADAK/xMBwAAAACGEgo2AAAA4EUUbAAAAMCLKNgAAACAF1GwAQAAAC+iYAMAAABeRMEGAAAAvIiCDQAAAHiRLQv2qlWrFBMTo8L...
[ "right", "obtuse", "acute" ]
null
2
science
grade-3
identify-rocks-using-properties
true
false
Select the one substance that is not a rock.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAANcAAAEGCAYAAAD2aACLAADgzklEQVR4nOz9V5MkWZqeCT7nKFc1TtycBs9IVllV3VXVqJ5uoGfQQ0QgMyO70jLYld1/sTd7sX9n7mZvRiCYAdCLBgeaFKoqWWVmRGSEh3N346acnbMX6hEZmZWZzSob2dX+ipiomRpTUzuvfud85P3En621fj2AtsENbnCDvwLCGj6J4byAvgm/22v2yxti3eAGfz20DXg9aO5H9Wf75Q2xbnCDvz5e8KjUn+2T/2UO5QY3+PXHDblucINvCDfkusENviHckOs...
2
science
grade-6
identify-elementary-substances-and-compounds-using-models
true
true
Look at the models of molecules below. Select the elementary substance.
"iVBORw0KGgoAAAANSUhEUgAAAKIAAAAiCAYAAADcQgLDAAAJ+0lEQVR4nO2beVhU5R7HPzOOOsCwS8oiaMrFXEJBFBdQEUXIcAlQy6TcKHdRU69mZco1TQzDG8m1cskULRXNHZUg1BABEZdMZUeZYZlhCWkY+gMZJdm83fswf5zPX+d5z/v7fb+c8z0v74HniKp3rKhBQKCVEdWUK4UgCrQ64tY2ICAAQhAFdAQhiAI6gRBEAZ1ACKKATiAEUUAnEIIooBMIQRTQCYQgCugEQhAFdAIhiAI6gRBEAZ1ACKKATiAEUUAnEIIooBNog1i...
null
[ "iVBORw0KGgoAAAANSUhEUgAAAVEAAADMCAYAAADK+ZBrAAAuO0lEQVR4nO3deXxU9b3/8dc5s2SSTPawBAhBFkFQo4CAiGgRq+ACxb32Fiut1qVuF7X+tNW2atVWxSuttlx3ror11gWXVmvF61ZFZRMEQdkJIXsmk9nOOd/fH2fOyUzYGSAh/Twfj+PMnDlnzhlM3vme73Y0QCFEB1vYpBicC3mejj4TIXYsZMKqMFTFocgL4wrt9XqHnpUQSRKgorPL89g/pwAtZtt6CVHRKUiAikOB83OaSLl+lxAVQogMSIgKIUQGJESFECI...
1
math
grade-4
classify-triangles
false
true
What kind of triangle is this?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACmCAYAAADgZPidAAAhyklEQVR4nO3df1yV5cHH8c85QCL4BHmmPgWGzwlLrNBEzHQkguG0XLXYfLQsdWqTZVpprZT8ncvUlc7VslaUWiRzHdKi2eOmoqDiDzDDtJgoSoTKD0V+HM45zx/WWWzWFA7c/Pi+Xy//gOs+1/W9X/XH18vr3LfJ5XK5EBERERERjzAbHUBEREREpDVRwRYRERER8SAVbBERERERD1LBFhERERHxIBVsEREREREPUsEWEREREfEgFWwREREREQ9SwRYRERER8SAVbBE...
[ "obtuse", "acute", "right" ]
null
1
math
grade-2
ordinal-numbers-up-to-10th
false
true
The first picture is a bucket. Which picture is tenth? first
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABdCAYAAACfMRFHAAAgFUlEQVR4nO3dfXBT15038O+9kgw4lnkzBWyXvBmwzTuktrZdAg3YJQm0u9jJLKTPBNMG0pknNjsbaJ8stHSTbSeE7mCnncQkjb3TDbRbO89uA4HHJlkSMhObgQ0hPHJ4SQJd2U5SygaZl8SS7t0/ZMmSrZcr6V5J997vZyYTY13pHJ85v5+Pzz33HEGWZRlERERERKQKMdMVICIiIiIyEg6wiYiIiIhUpNkA+3OPjNv/nxuL3hjA5x6uQiEiIiIic0hqgP1v/R789IM...
[ "crab", "bucket", "boat" ]
null
2
math
grade-8
apply-addition-subtraction-multiplication-and-division-rules
false
true
The number line shows an unknown number, d. Is 4d–1 positive or negative?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAApCAYAAAAPgl6QAAAGi0lEQVR4nO3dTWxT6RnF8WMbf2A7ZDLhQ+kIyCzaBUVCkGAShEas2pEQlZKBBaqGIlEhBaGyRF10F1GxyQokkFhRNYJNWLCZLp1Uqu3EMNakCepITQZoq8FACPH3dewuHFukE8dJx77XDv/fyr7x4ijXio7ePPd9bcVisSgAaCGjo6Oy2Ww6d+6c1VFgEu45gFayzeoAALBZz58/tzoCTMY9B9BKNlywDcNQNBpVOBzW7t27WUXYhEKyqIW/LCk1k1FqNivnTofc+13...
[ "negative", "positive" ]
null
0
math
grade-7
identify-complementary-supplementary-vertical-and-adjacent-angles
false
true
Which angle is supplementary to \angle{3}?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEBCAYAAABCCtJ/AAAkhklEQVR4nO3dfVDU5f7/8ReECN5wo4ZgIpjmLTdmNqmVojmOpQVWZqS7QXmOM02nbOaczjidk9ic0znfmc4Zms5N07GCXdRRy6ApM083a5pR0w0KKqLFqpOig7FJBhIuvz/8scVZFhZZ9rPLPh8zTfnZa3ffjOfMvLx8v68rrK2trU1AH6ioqNC0adOMLgMAAMCvwo0uAP1TaWmpioqKjC4DAADA7wjY8Lnjx48rLy9PFRUVRpcCAADgd2G0iMDXbrnlFn388ceSJP7...
[ "\\angle{1}", "\\angle{6}", "\\angle{8}", "\\angle{4}" ]
null
3
math
grade-6
rotational-symmetry-amount-of-rotation
false
true
This image has rotational symmetry. What is the smallest fraction of a full turn you need to rotate the image for it to look the same?
"iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAYAAACtWK6eAAAdD0lEQVR4nO2deZxdVZXvv+uce2tOqkhCIIgkQWUwkoEaAhhSFRD9ICq2yJSAw0NUbKdWP4K+tp36+Z6+bm1bWhsbnIA8DPjQVrCRoarCoKmBhAiKA0rEF8hAhqq6t4Z7z17vj5t0Q8xQw97nnHtrfz+f/JNP1Vqrzr2/s6e11wKPx+PxeDwej8fj8Xg8Ho/H4/F4PB6Px+PxeDwej8fj8Xg8Ho/H4/F4PB6Px+PxeDyVjyQdQCWj9yyup6bqUlQuQzkVqLFkegThlyj...
[ "1\n7\n of a full turn", "1\n8\n of a full turn", "1\n9\n of a full turn", "1\n10\n of a full turn" ]
null
2
math
pre-k
ordinal-numbers-up-to-fifth
false
true
The first picture is a moon. Which picture is second? first
"iVBORw0KGgoAAAANSUhEUgAAAaUAAABdCAYAAAAFZHluAAAehElEQVR4nO2de1jTV5rHvwlJIAkxIFcBEayICha1VkXRUm2ljoNSR4XVdrTVbu10n1m87Mzszjwqnc5OO+Olu9updoq1tmtXpbWtWCtW0Var6HgBwQsqitxEEEmIISEhyf7xI5FAgFx+uRDez/P0qSbnd36H9st5z3nP+76HYzAYDCAIgiAID4Dr7gEQBEEQhBEySgRBEITH4DSjJNMaEFvQgvGFCsi05CEkCIIg+sYuo/T1PS1yrqt7NTYnHrSjslWPYrkOr1xotXu...
[ "moon", "rocket", "star" ]
null
1
math
grade-4
interpret-stem-and-leaf-plots
false
true
Aaron, who rents properties for a living, measures all the offices in a building he is renting.
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAD+CAYAAAAAuXIHAAA4XUlEQVR4nO3deViU9eL//+ewyyKgKCiLu5IpLpllqUdFcwGlUFI7cjRF7OuSmRtHrazMrTxaWqZmWmbqcYnSzHAJU49WVCanzL3MfUVxC4H3749+zEcClTrjTDqvx3VxXeN77vfcr3vGP15zX+/7HosxxiAiIiIiIjbh4ugAIiIiIiJ3EhVsEREREREbUsEWEREREbEha8HetWsXvXv3pnLlynh6ehIYGEjLli157733+P0y7ZycHHr06EFAQAB+fn588MEHALz88st...
[ "5", "6", "4", "3" ]
null
2
math
grade-3
parallel-sides-in-quadrilaterals
false
true
How many pairs of opposite sides are parallel?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEOCAYAAACzXGCqAAAl/ElEQVR4nO3de3SlZX328eu5n52dzCSTOSSTwyQzg1IGUEDpjMhBYUQFquDrQBEqCL4VpG+prbZW3natruV6u7osFYtV2wJDLSCCggqCUkU5DKAcRzk51hEoMzlNziSTTHZ29nM/7x8JdwIyk2Sys+9n7/39/PX7SWY/17jCWtfKDr8dxHEcCwAAAEBeGN8BAAAAgFJCwQYAAADyiIINAAAA5BEFGwAAAMgjCjYAAACQRxRsAAAAII8o2AAAAEAezalgTzx1krJPbJT...
[ "2 pairs", "1 pair", "no pairs" ]
null
0
math
grade-2
fractions-of-a-group
false
true
What fraction of the shapes are triangles?
"iVBORw0KGgoAAAANSUhEUgAAAgYAAABKCAYAAADAOpyeAAAQmElEQVR4nO3dXWxTZ57H8V9iO3HsOLHztrMkaRxBYUkKq16QgFQWerGly1a9GKajlQaNRurSiyKq7UK7K3VGbS+3wHSkVbkYOnO9KuzNSluJ6cUwWiQI9GJmhMOUgYmZOGFwXuzYPn47x/ZeGJukefvb8fE5x/l9LgHbz/nqQfrL9uPTVCgUCiAiIiIC0Gz0AoiIiMg8OBgQERFRGQcDIiIiKrMbvYCSyblbAAAlGwMAuFs6AAAjvQcNW5MZsZMMO8mwk8x26qT8xxj...
[ "2/3", "3/9", "1/7", "1/11" ]
null
2
math
kindergarten
match-analog-and-digital-clocks
true
true
Look at the analog clock: Which digital clock shows the same time?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEJCAYAAACuWVASAABP3klEQVR4nO3deVjU57k//vewDagwg7KjzoBGBI2MS1wjS4wxiYlik7TN0oDnZOnpSVJsm/ac0wU8bU9/bXoqJjnntE3ylWxNmsaIMWbRGEfcgjE4aAQxAoOCiKDMgMIMw/L7A5mwzPLMxgzwfl0XV4aZ5/OZO8hc3PPM/blvSW9vby+IiIiIiMgt/LwdABERERHRWMIEm4iIiIjIjZhgExERERG5ERNsIiIiIiI3YoJNRERERORGAd4OgLzP1NkNk7ELncYudBq70Wn...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA5AAAAEJCAYAAADiusiGAABalUlEQVR4nO3deVyTZ7o//k/YAiokKIuImoBWBVuIS7VqZalbW6vidJnpYsUztTNnjnZwuszvfGcRTztnfjPtjNj2nO9MbX9StdNOp1bU2latFXAr1mLACmIFgoqIYElAISEsvz+QlCXLk33h8369eBmS+3meqzGxuXLd93WLuru7u0FERERERA4hEoncHQKR0/i5OwAiIiIiIiLyDkwgiYiIiIiISBAmkERERERERCQIE0giIiIiIiIShAkkERERERERCRLg7gD...
0
math
grade-1
subtraction-sentences-up-to-10-which-model-matches
true
false
Which picture shows 8 − 3 = 5?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAXYAAABKCAYAAACvkX8HAAAVrklEQVR4nO3daXRb553f8S92EABBggRXiRIpyiKpXbKsxVYmiRNv8dixm0wdW5mOZiZtk/ScSSedniZnzslM+iZuk0knb2q3kziamShpHcexYzuJlVjW1LaoxaZ2kxQl7jtBgNgucC/uBfoCJkiKpKiFFC34/3kjYbng89O5+vHBg4t7TZlMJjOswSUFogboGYQQQtxGrCYotMAdLqiwg2lYzWRORJZ7WEIIIRbDLi9YO5TsjSo7NLizrS+EEOL2ETWgPQ5DGlx...
1
math
grade-5
acute-obtuse-and-right-triangles
false
true
What kind of triangle is this?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAB0CAYAAAC/kkW5AAAYhUlEQVR4nO3deVjVdf738edhEzVPLCkCkVDG2C9sbiObSRstf5ZBpnWRlWDb0Zoa885b69bmRhuXERVNMa1ssWVk6qfpSC4zFtk4IYaIxy2XXHDFFVSU7XCW+w+TpMVQzuELh9fjurziHL7fz+d9uvjjdd7X5/P5mlwulwsREREREXELH6MLEBERERHxJgrYIiIiIiJupIAtIiIiIuJGCtgiIiIiIm6kgC0iIiIi4kYK2CIiIiIibqSALSIiIiLiRgrYIiIiIiJupIA...
[ "right", "acute", "obtuse" ]
null
1
math
grade-2
purchases-do-you-have-enough-money-up-to-5-dollars
false
true
A hockey puck costs 1 dollar and 3 cents. Do you have enough money to buy it?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAAEyCAYAAACPuaSsAAEAAElEQVR4nOy9e5wkVXn//14WsBpWOYUgXaKwh+ClBg10i8q0Ed32Fhujfme8JDOYyA6vqJlNjNnJL+oOJuKuJl9nYmKYxCiz4mXHC84gKq0k0CteerxAN9Fkyxuc1Xy12ng5ByN2cbN+f5yq6u7Zmd1ZQNmQ+rxeM9196tS5n6rPec7zPGdDHMcxOXLkyJEjR44cOXLkeFDgqAe6ADly5MiRI0eOHDly5Lj/kBP8HDly5MiRI0eOHDkeRLjfCb65K0Ze+zNKjf/G3JV...
[ "no", "yes" ]
null
1
math
grade-2
names-and-values-of-all-coins
false
true
Which coin is this?
"iVBORw0KGgoAAAANSUhEUgAAANUAAADVCAYAAADAQLWDAACk8ElEQVR4nO29e1CVV5Y2/igWipBzBEQJEoRuEfEOmQJNQUuMduiKpiWtlVhqkkmqjPbEmprEX6dzmenq+ZL4ZcYkNWW+9lJlbmqZVEywI6km0RgMVBSrI15iCOL0OSIiioDnCKKWhN8f+13rXXu/+xxIOt25dFaVBXLOec972Wuv27OeNaivrw8/yrct3d/gQ4gf9M0d60f5OjLk2z6BfwzxKk3fxf0AgJqaOv5bW+A4yisPfaUjl5XmAwBSsiYBAIqK8voQPodBGQs...
[ "dime", "half-dollar", "dollar coin", "penny" ]
null
2
math
grade-4
identify-parallelograms
false
true
Is this quadrilateral a parallelogram?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAADpCAYAAAAeakAkAAAiUElEQVR4nO3daZCV153f8d957tq3N2iEEEICSSAWLawNSAIk2ZYs25Ijx3tGnhknFXvGNeN4Xjh2VRJ7MpOKquxSVYpMTWU0rqRiqzwVeVTxJtma2NJYAiS2Zm0BMpsAozY7vd/1OXnRzXNvs3Q39O177n3u9/PCdc4x3f27nqHqz8OP8xhrrRUAAACAsvBcBwAAAADChAEbAAAAKCMGbAAAAKCMGLABAACAMmLABgAAAMqIARsAAAAoIwZsAAAAoIwYsFG1Cud/rtz...
[ "yes", "no" ]
null
1
math
grade-2
write-subtraction-sentences-to-describe-pictures-up-to-two-digits
false
true
Which subtraction sentence does the picture show?
"iVBORw0KGgoAAAANSUhEUgAAAfQAAAH0CAYAAADL1t+KAACeyUlEQVR4nOz9e5gU5Z3//z+r+twz3TPDDD0wwAwDMoCMCmrwAJqgwbgSF3XzXdZ8QkTc7DduQP3tmlzrHty9cuVyf242m2RNcmUxa2Ax+clKkq/Xd2WVKCoICopBPAEDMjBymAPDzPR0d/Whqn5/1Ez39EzP+dR0v1/X1ddOV9111/3gXnNXd991l2KapolEIpFIJJJLOupkN0AikUgkEsnoIwO6RCKRSCQ5EBnQJRKJRCLJgciALpFIJBJJDsQ+5jVGQxin3sUMX8S...
[ "92 − 6 = 86", "93 − 5 = 88", "92 − 5 = 87", "92 − 4 = 88" ]
null
2
math
grade-4
interpret-stem-and-leaf-plots
false
true
Katy counted the number of silver beads on each bracelet at Morristown Jewelry, the store where she works.
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAClCAYAAABm8IozAAAtcElEQVR4nO3de1jN2f4H8PeuXe1S2qlI96Qkya2ZcamjCCE5UZjBMEoMxiWTybjFMW4/MR0MD+NgxtCIhjM0xpiIDobDpFwmRrlEuRYRuq3fH572ma2LjV3fzLxfz7Ofp9Ze67s+3+/uj7ev9V1bJoQQICIiIiIirdCRugAiIiIioj8TBmwiIiIiIi1iwCYiIiIi0iIdALhy5QrCwsLg4OAAfX19GBoaws3NDdHR0Xjy5Imq88iRIyGTyTB58mQAwMaNGyGTydC2bVs...
[ "12", "8", "10", "11" ]
null
0
math
kindergarten
count-money-pennies-and-nickels
false
true
How much money is there?
"iVBORw0KGgoAAAANSUhEUgAAAMcAAABECAYAAAA1ISGwAABObUlEQVR4nO29d3gc53nu/Zud7RULLBa7ANE7wd67OiWqd8l2JMdFbvGxHcsnTqzEcUnsczmO5ShObMstlm3JkiLJalQhqQJSYifYQKKQ6G2xABbby+zMfH8sZ0LGlExKlJ1zPt3XxQuFAGbmnffp9/O8gqqqKu/jfbyP34PhT30D7+N9/E/F+8LxPt7HW+B94Xgf7+Mt8L5wvI/38RYw/qlv4P8vUBQFWZaRZZlsNsvs7CyKopBKpUgmk8TjcWw2Gz6fD7fbjSiKWCw...
[ "11¢", "13¢", "9¢" ]
null
0
science
grade-7
compare-concentrations-of-solutions
false
true
The diagram below is a model of two solutions. Each blue ball represents one particle of solute. Which solution has a higher concentration of blue particles?
"iVBORw0KGgoAAAANSUhEUgAAAbAAAAEVCAYAAACBn7B3AABwxUlEQVR4nO2deYAcZZ3+n7eqz7lnMjkhxxBykJOA3IeCAuEGUVD8oUERxWMXEVlWXBVYUBY5hF1QREV2UZdDYIXIKQqKckOABIgk5L4z9/RZ9f7+qHqvqurJzGRmMtP9/Wjoqerq7urq96nvWW8xzjkHQRAEQYwyrD29AwRBEAQxEMiAEQRBEKMSMmAEQRDEqIQMGEEQBDEqIQNGEARBjErIgBEEQRCjEjJgBEEQxKiEDBhBEAQxKiEDRhAEQYxKyIARBEEQoxIyYAR...
[ "neither; their concentrations are the same", "Solution A", "Solution B" ]
null
2
math
grade-5
parallel-sides-in-quadrilaterals
false
true
How many pairs of opposite sides are parallel?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACbCAYAAABYgOzuAAAdBElEQVR4nO3de3zcdb3n8ffvNzO/mVyaSdLck6ZNk95QzsGFVbzyWHAFFQsWuewqHhWPiCgqnId71vN47F979LFnT+EoFPFSdMULFSmI0LUuoCAc8Bx4WEWkbZKmSXO/XyaTuf/2j0lnGmjTTjvJby6v51/5/phf+inJwDu/fL+fj2Hbti0AAAAAWWE6XQAAAABQSAjYAAAAQBYRsAEAAIAsImADAAAAWUTABgAAALKIgA0AAABkEQEbAAAAyCK30wXg7P34+xOKRW1...
[ "no pairs", "1 pair", "2 pairs" ]
null
1
math
grade-1
which-table-is-correct
true
true
Deb saw the following animals at the beach:She wanted to know how many of each animal there were, so she made a table of the animals. Which is her table?
"iVBORw0KGgoAAAANSUhEUgAAAS0AAADJCAYAAAB2QWTOAAAkd0lEQVR4nO3daZBcV3nG8f/d+t7eZnqmZ2+NdtmSQyRLlhTbwkthFyZgAzaLCxySOElRUEnZcQKJQ0EgUKECSXBMAnZYHKgUwQ4JoVKExSzGgG3ZkmVLaCRb0mg0m2ZrTe/L7bt0PrQkbLAlSzPyzJ1+f5+kqp7W6Vb3M+ee8973KB/72MfqCCFEQOgAH/3oRxd6HEII8YqoCz0AIYQ4FxJaQohAkdASQgSKhJYQIlAktIQQgSKhJYQIFAktIUSgSGgJIQJFQksIESg...
null
[ "iVBORw0KGgoAAAANSUhEUgAAAmQAAADJCAYAAACNDC6lAABQqElEQVR4nO3deXiU9b3//+e9zT7JJCEbIeyrrWwCIqh4BHHfW9fabz3tqT3ntFo9tdW24lK7aBdrPVZr1a5aLXrU/twXUBFEBAQkgEAIZCHbkGT27b7v+f0xJJUCsgQYQt6P6/ICJ/fc874nYfK6P6tyxx13ZBFCiD7ijjvuyHcJQghxyOkAt99+e77rEEKI/SKBTAhxLFLzXYAQQgghRH8ngUwIIYQQIs8kkAkhhBBC5JkEMiGEEEKIPJNAJoQQQgiRZxLIhBB...
0
math
pre-k
count-sides-and-corners
true
false
Which shape has 4 sides?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAF3ElEQVR4nO3dz2scZRzH8c/mp01avVX8A6J4UfBgsZT25k1PnkQQEQr+LaUUeqggFVHEg3hRT00opaFUU1BSDw11bQltIYkNpW5md7u7M/N42I40Gtvs7ux3nmfm/bqlmzST5L07893ZebbmnHObXemPlrSTSLETMLKpmnRoUlqYk16ckWqbHeeuNYreLJTZkeelqXqr/8FLM9Ir8/0KgVHtJNLNprTRlX5vSRONuH8DkSFPhyb7TUlSlEgTyRM3AHnKmuo5aaL...
1
math
grade-8
model-and-solve-equations-using-algebra-tiles
true
false
Which set of algebra tiles represents the equation 2x+8=22?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAYIAAAB6CAYAAACyTFRJAAAJ6UlEQVR4nO3dX2yV5QHH8d95T0vV03+u9QBSwtAw16KLsEETF9GYkexPzLIcdmFi3I1ZuCG7qRduGAJLRsKVN1yYOO8Wg7Eh0bhlI00GLCMVw9CFMlZgPVFoe3oGy4FTKPC+7y6OGq0l9rzn/fs8388NWtt+D+957C+Hc0pzvu/7M7ek8/PSNVe64wsAYLC2nNSVlzbcJ61cIeVmFnz//VrSNwsAkIThbqltcr7xL6tXSI8UGisBADDXNVc6V5emb0n/npec2p3...
1
math
grade-2
choose-the-appropriate-measuring-tool
true
false
Which tool would you use to find out how much a container of flour weighs?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJYAAACoCAYAAAACcRc/AAAh/ElEQVR4nO2deZgU1b33P1W9zNbTPTP0TM/OsA0ICIIYFRANURDRGFG8cQleFxKvQRPNIy6PeS+JiZq4XQVJcHsVswjm1YgLuOWKgMqmYhCYAcaBYfa9Z+u1zvtH9VR3z4IC3T3dWJ/nmamuU8s5Vf3t39l/RxJCiDoPHOiGDj/4BDo6x4xRgnQDjEkFhxmkOrcQ25xDnSydk4kzrWDc363u5JlhbJqqOh2dY6XDD2VdUOuB8m6QnT71gC4qnRMh3aBqCKDTD7I...
0
math
grade-4
compare-fractions-with-like-numerators-or-denominators-using-models
false
true
Which fraction is greater?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAC5CAYAAAAS5EjTAAA0/UlEQVR4nO3dfXBb5Z0v8K/jZNfmJZJgOjhespLtMLQJIDmBNqQOkrYNBDY0Mtw4YbZguXHAM/tHZNIUp3f3Wu7srSFkY5mZ2y3BEBk6UxKXWmkysw0EfGKLhLm3vlYI3nK3cXzclBi2e/Exl0WhiNX9QzknsuPEejlvsr+fGYbEks7zOP4xfPOc33meomQymQQREREREaligdETICIiIiKaSxiwiYiIiIhUxIBNRERERKQiBmwiIiIiIhUxYF80OTmJoqKiy/75+7/...
[ "5/8", "5/12" ]
null
0
math
pre-k
count-sides-and-corners
true
false
Which shape has 3 sides?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACaCAYAAABR/1EXAAAD+klEQVR4nO3by07bQBiG4c8JsKDQ7lp10WXbS+C+uEkk7oDSfemyCUSCErkLl5ZDEnyY4/+/7yqWFWUWj+zYM9O0bdte3UnfV9JyLd23IprcXiMdz6XPh9KHA6m5um3b80XuYZHlTt5Ke5er7uDjgfT1TaeQaGrLtXRxI/24k76tpNnivjsBMgrZ8bwzJUnXa2m2fnSCKGQPpn630izvUMhLQKMkAY2SBDRKEtAoSUCjJAGNkjQY2tnZrxjjIOONgLYAGw1u1K0...
0
math
grade-1
name-the-two-dimensional-shape
false
true
What shape is this?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAADXCAYAAAAgGib5AAAQ1ElEQVR4nO3dP1NjV57H4d9sTbS1L2azfZ3dRTUJk3SPk6bGEVV2Aom9AXhiSCGypGaEUINUSPecs4F6p+yZdvNP0rn36nkyt0H3C7qq+hg3R38qpZQAAADW4j9qDwAAgD4R2AAAsEYCGwAA1khgAwDAGglsAABYI4ENAABrJLABAGCNBDYAAKyRwAYAgDUS2DsiDd7UngAAsBME9g7I0+NI479Fnh7XngIA0HsCu+dKmkUz2I+IiGawHyXNKi8CAOg3gd1z+fp9RDN...
[ "triangle", "rectangle", "hexagon" ]
null
0
math
grade-5
nets-of-three-dimensional-figures
true
true
Which figure will this net make?
"iVBORw0KGgoAAAANSUhEUgAAALwAAADNCAYAAAACNxrPAAARw0lEQVR4nO3df1TUdb7H8eegKIklF43c0hOwoWyoqNWynNM5kJ3jwuYeLH/dChEsBHJ3Abc0vBaCLEmSSlsLk21o6XpT2+RkC3lOiud4D2eu5nVE2UF2kY7Yj9kkiDRQnLl/zDLFD+PXDGO9348/p+985y3z6j2fz+f7y2C32+0oJYSXpwtQajiN9HQBnmAwGDxdwg1B4o+7uA6vYf+WxL+FyA4P8L+Lqz1dgkf9fM90T5fgEeI6vJJNA69E0cArUTTwShQNvBJFA69...
null
[ "iVBORw0KGgoAAAANSUhEUgAAATgAAADNCAYAAAAsV2x0AAAnu0lEQVR4nO3de1zUdbrA8c+IaCkIW0nrLRk3hBMVF02z9hzA3VxMC1xv2XoBExVPe4BMS1flIlneAqoVCDcwLSvbhMowW2XcUxGiOIi6KB0dQywxbRBpvXA5f4wzcVUuc3Pmeb9evczpx28enHz4fr/P9/n+FA0NDQ0IYScUCoWlQxBm1M3SAQghhKl0t3QAliA/xXVk8C5snd2N4CS5/UL+LISts8sRHMC+KSWWDsGiRnzwgKVDEMLk7G4EJ4SwH5LghBA2SxK...
0
math
grade-3
match-mixed-numbers-to-models
false
true
Which mixed number is shown?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABkCAYAAAC8REciAAADG0lEQVR4nO3aIW4bURSG0TuRN5F6E5GKAmpkVNgthFkq9xIGFwzzDkrLBoVUZe0ionYXU1A3slTFM+CPXhqfw0bvgStd8ulpummapgIAACJWVVUfvnysb79+tJ7lot1e39Tn95+ePLej9uZ2BABQVXVVVcLtBfj68/vZcztqb25HAABVxxfsv/bbXas5Llo/DovvPtzdP+MkPGV92LQeAQD4T1y1HgAAAF4TgQ0AAEECGwAAggQ2AAAECWwAAAgS2AAAECSwAQAgSGA...
[ "1 1/3", "1 2/3", "2 1/4", "3 1/2" ]
null
0
math
precalculus
determine-one-sided-continuity-using-graphs
false
true
Is f(x) continuous from the left at x=8?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH/CAYAAABtkqoWAACAj0lEQVR4nO3deXxU5b0/8M+Zc2bJnpBAAoEEkEWDAQmLEkCwWrWiVnDBelurtYttrV1ue7ve9tdqvd722t7a2vZ627p0ua1W3MCAKAg0EQIBAgkIIUAgQJbJOpOZOfvvj5CUCEgC5+Fkks/79fLVzsmcz3w5Z+bMd5555hzJtm0bRERERETkCI/bBRARERERDSVssImIiIiIHMQGm4iIiIjIQWywiaiPdevWYfz48ViyZAkA4JZbbsHLL798xvvquo6rrroKmzdvvpg...
[ "no", "yes" ]
null
1
math
kindergarten
more-or-less-likely
false
true
On which color is the spinner less likely to land?
"iVBORw0KGgoAAAANSUhEUgAAAbEAAABkCAYAAAAIVA6ZAAAQkklEQVR4nO3da3RTZaIG4LcXem+zU1qlMq2lMCD0Btkp4mUUi4vRowLqUtpa1OLMmnWO57JmDXY4czyyxj8y4DnOz8FLi0DTgtyPsjzIRZyzLGoSoLQo0HJrUUpTshOSpjeS80PLKjZt0zZ77+zwPn+wSbO/t/551/ftL9+O8Pl8PhAREWlQpNoBiIiIxoslRkREmsUSIyIizYpWO8B4uN1dkBwSJLsEuyTBIUkAAJ0gQC8IEPQCBJ2AxMQEdYMSEZGsIkJ5Y0dHRwf...
[ "white", "yellow" ]
null
1
math
grade-4
elapsed-time
true
true
Look at this clock:What time will it be in nine hours and sixteen minutes?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAADICAYAAADSmpa3AABQy0lEQVR4nO39e3yTdZr4/7+SpkmaQ1sobVoOLUhbHEUKjCBqwcOoiIInQFFnR1Zw5rcDKs7srjqDn535iCPuzoiozGd/K7g4Dgpaj6DgiKhQFUQpJxVoESiHJi2FprnTJmmbfP+4adqQ9HxID9fz8eDR5H2froT8ceWd677emkAgEEB0jdoy8BaCtwh8p8DvhDoF/ErD38aP6ypAo4OYBNBaIMai/q1/rDFDjBViBoB+MBguAP1I0A2K9isVQgghhBDnaCTB7qha8P6...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA7gAAADgCAYAAAApDMpcAABqL0lEQVR4nO3deXxU9b3/8ddMkskyM0kgJJOwJCBJsIpsFVdAbUVExQ1Q1LbSqu2tomJ7b6ut/tpeseptq6LFe3sFL9aqqFgXXLDiBlhBLZu4QIJAWLJAIMnMZJkkM78/TjLJZCb7JJPl/Xw8eMzM95w55zPjfOPne853MQE+REREREQkLHw+H0UeyK8EZz3UKdsW6THRJrBHQU4COCxgQg1cEREREZGwKarx8UlFpKMQGXxOT4ToSAchIiIiIjKQ5FUajxkWGGc...
1
math
grade-1
select-two-dimensional-shapes
true
false
Which shape is a triangle?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACQCAYAAADwZHJxAAACaklEQVR4nO3UPW5VVxiG0e9e/0QiEDpHkWiBITATD5KhMANCSiRMSttYsvHVSXGElM4F1nMiZ61qb+3mLR7t3bIsy8XdzF83M1eHmftl4Kcd72ZeHM28fjbz++nM7uJ2WT5cbj2Lp+zdbzPHn27Wyx+nM29/XSuEn3V1mPn4bebL3cyfNzP7y/v1QWQ8phdHa1MzM9eHmf3hXw/wmH409X2Z2W87hf8LoZEQGgmhkRAaCaGREBqJ460HPOT9+7/n8+fbrWf8Z71...
1
math
pre-k
fewer-more-and-same
false
true
Are there more sleeping bags than pillows?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEECAYAAAASx0PMAABGsklEQVR4nO3dd5gceULm+W9Eep9ZJssb2ZLrltRO7Xt6XA+MZdhhHXa4gwNmuQc4YO84WPbgYHdvWQMsyy77LMuwDOzsDDCWsd3Tmp7paSfTrZZ35X1lZqU3kXF/ZFVJJVWpqqSUulL9fp5nRlJVZkRkvk9Gvxnxi18Ytm3biIiIiIhIXZhv9QaIiIiIiNxNVLBFREREROpIBVtEREREpI5UsEVERERE6kgFW0RERESkjlSwRURERETqSAVbRERERKSOVLBFREREROp...
[ "no", "yes" ]
null
0
math
kindergarten
count-scattered-shapes-up-to-10
false
true
How many stars are there?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAAFzCAYAAABLvX1lAABOjUlEQVR4nO3deUBU59k28GsYdkEQESEqilJJJGqUumBwI67EaGwEI8bEmMQ0S9PYvvqa3dq8Malt0zZp+mlNY6LRKLjELa4oCgbX4BoFBhBEHRdQIYADM/P9oaQuMMxyzpzt+v1VZs48c9e43PPMde5HZ7VarSAiIiIiIlXwkLoAIiIiIiISDht8IiIiIiIVYYNPRERERKQibPCJiIiIiFSEDT4RERERkYqwwSciIiIiUhE2+EREREREKsIGn4iIiIhIRdjgExERERG...
[ "8", "7", "2", "6" ]
null
0
math
grade-7
parallel-perpendicular-and-intersecting-lines
false
true
Are these lines perpendicular?
"iVBORw0KGgoAAAANSUhEUgAAAHYAAABKCAYAAABuH6DHAAAJkElEQVR4nO2dfVAU9xnHPyCCR3IgEAgvCaBTQ18I40xTnDRGrU5qBRXiW0qMScAW32I0oWkgUalRkTRSNaZ5oTWOUaSRYKooGTuVIMYxkk6DRCZlzCiHvTs8y93hAae83PYPYPWQ6IF37N65n78W7m73Wb73e55nf/vdH16CIAgoeBzeUgeg4BoUYT0UWQhrbjOzu6KIBoNG6lA8Bi+51Nipa5KpqjvJ/aPDWPKrDGYnJjF+TILUYbktshG25kItj7w8ye53MWHRpEx...
[ "no", "yes" ]
null
0
math
algebra-1
surface-area-and-volume-changes-in-scale
false
true
Look at this cone: If the radius and slant height are halved, then which of the following statements about its surface area will be true?
"iVBORw0KGgoAAAANSUhEUgAAAKoAAABtCAYAAAAxm/qOAAA/hklEQVR4nO2dd5wdVd3/3+fMzL27m7KbZnohBEJoCZEeQgIIhiBFBBRQiWLh4UdVeHxEqqAPKAp2RB4MqCAIEoIGlRIIvW9iAoH0Jgkhkp7dvXfO+f1xypy5e1OAbBKE7+u1e++dOXOmfeb7/XzLOSO01pqP5CPZwUVu7wP4SD6SLZGPgLoJmXP73Vx1wTcY/LEeHL/Xx7f34XyoRXxk+qvL36++js9d/31Wrl4NQCIjRu60C4/Mfm07H9mHUz4CahX52Zlnc96tvwJ...
[ "The new surface area will be\n1\n4\nof the old surface area.", "The new surface area will be\n1\n2\nof the old surface area.", "The new surface area will be 4 times the old surface area.", "The new surface area will be 16 times the old surface area." ]
null
0
technology
grade
logo
false
true
This is (part of) a (former) logo of which computer related brand?
"iVBORw0KGgoAAAANSUhEUgAAAVwAAAEsCAYAAACPNAvtAAAmjklEQVR4nO3dZ3xU1fr28WvNJISE3vkjhKqACJIT6aAURaSJKEWkiSBSAqRPeu+FUAQLoiIiIoKCBfAIAoIUEUQBkRbpvYcQkpn1vMDjczw2yp5ZM2uu7zt9Ee7Pzp5fkpm91hLbtu4GERHZn0n1AERE7oLBJSJyEAaXiMhBGFwiIgdhcImIHITBJSJyEAaXiMhBGFwiIgdhcImIHITBJSJyEAaXiMhBGFwiIgdhcImIHITBJSJyEAaXiMhBGFwiIgdhcImIHITBJSJ...
[ "Amiga Inc.", "Maxtor", "Linksys", "Diamond Multimedia" ]
null
2
math
grade-4
elapsed-time
true
true
Look at this clock:What time will it be in 3 hours and 30 minutes?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAADICAYAAADSmpa3AABF7UlEQVR4nO3deXSUdZo3/G/dd+1r1kpQiiULNiYkURa7E7RFW8BtXgy2jE6D9jwz3eDyvtMK6jPzdKttT59W0e7zjAqO79MK+GqjIk6LCrjgFpwWkASIG5UIBKWqspDUvtf7R5GCUEu2WpLw/Zzjseq+f3XfVyrFOVf9cv2unyQSiUQwQidbXehpdsDZ4YX7hB8eiw/u7/0jvRzRqEjVAlSTFFCXyKGapIC+XIXieXqoSuS5Do2IiIjOIZLhJtjH3+7G97tOorvZgZA...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA7gAAADgCAYAAAApDMpcAABbuklEQVR4nO3deXxTdb4//lf2Pd3TIlSgLTBYaFHApQUUlcWF+SGojHMH1DuLLHrvqKCOy7jO3FFAvXcUUMdR0a+KijCCsqkoUBxZhAJVgbYsZUnThbZZmj2/P0IDpUmXNMtJ+3o+Hj5ITk7OeTfNp74+53zO54gA+EBERERERBHh8/lgdALlNsDsAdxM20RRIxUBOgkwSA1kygER2MElIiIiIooYo8OHHU3xroKo97lCD0jjXQQRERERUU9y2Ob/t48cGKLxn10...
1
science
grade-3
identify-vertebrates-and-invertebrates
true
false
Select the invertebrate. Hint: Insects, spiders, and worms are invertebrates.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK8AAADMCAYAAAAF8vOBAAEAAElEQVR4nOz9V7C12X3eB/5WePPOJ58vh84BDaARSAIEkwlRlDgSZUsaSeURJY1H5VG5aoJdurDscpDGnqCxVZqy7JKsaNGSKDGCokgQFAAiN9CNzt1f/k4OO+83rzAXBzO+GKqKmr6xq7iuTu3a5+Z9n7X2///8n+dZ4ltz75/KoKv4vfV763+Wa2nhvRyOGhhq+NTg4nP5e8D9vfU/99VV8FR28ffK/k+fy98D7u+t/yWs/w9OW/8/faZ/py/+J//yB7CupKk...
0
science
grade-2
identify-mammals-birds-fish-reptiles-and-amphibians
true
true
Mammals have hair or fur and feed their young milk. A gorilla is an example of a mammal. Select the mammal below.
"iVBORw0KGgoAAAANSUhEUgAAAtMAAADMCAYAAACx6y9WAAEAAElEQVR4nOz9ebwlVX31j7/33jWc4c5DjzRj04wNMgUFQYkDgzgggyIIEQd+OEMSQROjxOfRRIizJqAgCCQqj/ErGg0gMYigMoqgMk/dTc+373CmqtrD749dp+69NEPTXG1Nar1e59V9z6lTtU/Vvueu/an1WUs455zWGmstJUqUKFGiRIkSJUqUeG5IKQmCAJFlmSuJdIkSJUqUKFGiRIkSzw9SSmRJpEuUKFGiRIkSJUqUeP6w1iK39SBKlChRokSJEiVKlPhTRUm...
null
[ "iVBORw0KGgoAAAANSUhEUgAAA4IAAADMCAYAAAAmsx3gAAEAAElEQVR4nOz9d7gkZZn/j7+eip27T85nck4wMAwwpAGJkkEFQRB11zWL6yquaVn3o7uKiqvsLgYWFBTFRJIcBpgBJg+T05k558zJsXN3pef7R/XpmSEO7Kz621+/rutcZ6a7uuqpqqfr1Lvu+37fQkopHcfB8zwqVKhQoUKFChUqVKjw1iiKgqZprE3BrDBE1b/0iCpUeH3SLuzMQp8FVRqckvBfVyoisEKFChUqVKhQoUKFt4fneTiOUxGBFf7qiar+wwqAjHv...
1
science
grade-3
identify-rocks-using-properties
true
false
Select the one substance that is not a rock.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAANcAAAEGCAYAAAD2aACLAACXVklEQVR4nOz92ZNl6ZXlh/3OPNx5vj6HxxyZkRMyC0BNjapqsqs5PkgyNvWgP6HNKNI0mLWZXsUHydQPohklo5FGUiZKapHN7laxhxpQQFWhgExkJjIz5snDZ/c7j2ce9PCdeyIyC6hCARkooOHbzO16XPfw8Bv37PPtvfZaa0sfTNP0RgFKChdxERfxE8Q8hodLOA2gpsJvVMXz8kViXcRF/HRRUuBGQXy+iF88L18k1kVcxE8fqzwK0xfPyX8zv8pFXMS//nG...
2
math
grade-6
which-model-represents-the-ratio
true
false
Which model represents the ratio of 5 circles to 5 squares?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAlUAAABRCAYAAAD7CFONAAAKd0lEQVR4nO3d248b5RnH8d94PD6vnd0NLISGANqkEVSqhIjSggBxUakXTaVKva16yV/XVgKEKqGKFihtOVVQiTbJFgipciDZg+312TPTC3chJWGznnnn9Or7uUmi2DPPo5/0zjPj8dgJwzC8MZW2hlLfl+ahAAAAcB9lR1pxpdMNaaMiOTcmYfheL+uyAAAAiut8WypfHi7+8XBF+n5zMXEBAADgcH1fujiQrk+lS0Op1Jsv/oOBCgAA4OhW3MX8JEn7vlTy7/g...
1
math
kindergarten
triangles
true
false
Which shape is a triangle?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJoAAACTCAYAAAB28ADfAAACd0lEQVR4nO3UPW5VVxiG0e9e/xT8pQPRpAtRRoDEQJgNVWbDQFIwAQSkShOntcESxleH4giJyg3WcyKzVrW3dvMWj/ZuWZbl7Grm78uZi8PM9TLww453Mw+PZn67N/PkdGZ39nlZ3pxvPYu77PmjmeMPl+vl6enM7/fXCuFHXRxm3n2a+fdq5v3lzP78en0QGbfp4dHa1MzMx8PM/vDdA9ymb019WWb2207hZyE0EkIjITQSQiMhNBJCIyE0EsdbD7jJy7/+nLf...
2
math
algebra-2
find-solutions-using-a-table
false
true
Look at the table of values for the functions $f(x)=2 x+7$ and $g(x)=(x+1)^{2}-3$ Based on the values in the table, where does the equation $f(x)=g(x)$ have a solution?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAAC9CAYAAADGKAkVAAAchklEQVR4nO3de1hVdaL/8Q8XAQ28hCYokihHUNPSTCW8pKY5mpOX8QKmWYZ57TRDOWGZHif1IPzKMJFjymRqY5JlanTAn00qFWKTSua1xFveFQJUBDb7/KEwEgrbAhZ79X49D8/j/q611/rs5T+fvfZ3reVgtVqtMpDD292M3L3NNvZ4XYO2vWp0jArZS85bsU5NMToCAACA3XM0OgAAAACAykPBBwAAAEyEgg8AAACYCAUfAAAAMBEKPgAAAGAiFHwAAADARCj4AAA...
[ "between x=-2 and x=-1", "between x=-3 and x=-2", "x=-3", "x=-2" ]
null
2
math
grade-3
acute-obtuse-and-right-triangles
false
true
What kind of triangle is this?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACqCAYAAACXpjjmAAAbuklEQVR4nO3da1jVZb7G8XstWELLcBnBSA2KYg4KeQya2NW4p3Eyxhq0siwskTLTTTlmhRVOdnA6TAc7aDVpOYqalkPjMIYho2VoCBYqWaZ5QhCJPCCCnNbaL7pEdruD6Vrr/1+L7+ddhTx3V724r+f6/f6PxeVyuQQAAADALaxGBwAAAAD8CQUbAAAAcCMKNgAAAOBGFGwAAADAjSjYAAAAgBtRsAEAAAA3omADAAAAbkTBBgAAANzIIwX7jTfekMVi0Y033qgvvvj...
[ "obtuse", "acute", "right" ]
null
1
math
grade-3
coordinate-planes-as-maps
false
true
What is at (4, 8)?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAFjCAYAAAAHNnwuAABkoUlEQVR4nO3deXxcdb3/8dfZZs1kaZKme0spLW2BAhGK7JsgXBYVFFG8XJALtWwKF/Ehrlf8sVxBRHHDK+IVRAUR0YvsUEBE7EUQKAVpaUnbtM2ezHbmLL8/Jpk2bYAuk2Z7Px+PoZmzfT8zLZN3vvme79cIwzBEZBfrSWfpyeTf8zjXLeAWPIKW13BbXgIgzLYAYMTrsCOVmJUzSEzeG9M0MU3zXa8XizpUVyZ3/gWIiIiIvAN7qAuQsSkIQzzPf8f9bsGjZ+Mqcsv...
[ "hamburger joint", "restaurant", "hotel", "art gallery" ]
null
0
math
grade-6
mean-median-mode-and-range-find-the-missing-number
false
true
Felipe has the following data: If the median is 18, which number could v be?
"iVBORw0KGgoAAAANSUhEUgAAAaUAAAAkCAYAAAApSSVnAAAISUlEQVR4nO3de1BU5xnH8e/ustxvcldQERFQq3gBBcFbIjGjrU1tMqnTZmw01oljk9Zp0mYynWlNJ/mnk7am1TF2mmliYmqMYnWMsdYbiIiCgEpAkYuggprAgiyLezn9A6HdoFXwHPYYns9/vGfZ85tnX97n7DmHXYOiKAqA3eWiw+HEpSgoCCGEENoyAEaDgQAvE2ajsXtMURTF6nDS6XR6Np0QQoghy89kwt/LhNHuUqQhCSGE8KhOpxO7S8HY6XR4OosQQghBp9O...
[ "20", "16" ]
null
1
math
grade-2
estimate-to-the-nearest-ten
false
true
How many marbles are there? Estimate.
"iVBORw0KGgoAAAANSUhEUgAAAlgAAAGxCAYAAAC+xcgLAAEAAElEQVR4nOz9ebxdVZnui3/HmGvtfu8kOw3pSItAIgqKoFWi0hzBDjtA8BxLbH51qtF7ylN6SvB3Cm+BdarqVnkv55TWwaprU1pWgYpK2dIrjQIBBQ1JaNKQZG9IdnZ2u/o1x7h/jGaOuXbfZidZ7+cDM2vtbsy55hzjHc/7vM8jtNaaetSjHvWoRz3qUY96zFrIYz2AetSjHvWoRz3qUY8TLeoJVj3qUY961KMe9ajHLEc9wapHPepRj3rUox71mOWoJ1j1qEc96lG...
[ "about 50", "about 90" ]
null
1
math
grade-4
angles-of-90-180-270-and-360-degrees
false
true
What is the measurement of this angle?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABSCAYAAABuZ6OSAAAKSklEQVR4nO3dfUyUhwHH8d+BR09hg0ULaOMrLJPY0aP/OF02ta5xMba+tM5qmdIiSn0rWpVqTKWpQwEFK7XBVjq0TGvb2FpbJ7X1ZWlQtyxcTQx2AaEa650v6ZFCZPLy7A8NA0EEveO5O76fv7jjebgf/PXj8tzvsRiGYQgAAACARwSZHQAAAAAIJBRsP3T8jEPHzzjMjgEAAIAO9DE7ADpX7XLq2/OVOn7GoUP/OqX/XLqk8H6hcrz9rtnRAAAA0AEKto+pdjm166s...
[ "180°", "270°", "90°", "360°" ]
null
0
science
grade-4
compare-temperatures-on-thermometers
true
false
Select the thermometer that shows the lowest temperature.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJQAAAC8CAYAAACew4ePAAATsklEQVR4nO2dT2wbV37HvzMc/pNEWpYlWTFpI7G7G9JBHKdByFOCxKCBXAxD8jWAgsWeZKtID4sQdoDFLiqtVBT1okqCXgJIsA85tCTcXDYQE+dQuCDtFNukG9Lerr2IRa0dJzKWsmzx30wP1HsekjMUSQ3JeaP3AWhS5MybR86X3/ebH39+T1AURblXAP7vMbBeBkoKOJymkATAYwN+0gfsd1SeE+7lFSWV623HOOwT9gKjDkD64+PKE884gOf7K4rjcJphvQz...
2
math
grade-3
identify-rhombuses
false
true
Is this quadrilateral a rhombus?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAACkCAYAAACtrFmWAAAZ10lEQVR4nO3de3xV9Znv8S+5EZMgWzeXYLgIGFEEG6aknraDAQQCzpnWaesFayCiU4GZjpLO4UxrvGC4eOk4ryMWYnXA4VLRcHNa20CUUF6K6aCQCkHxgiQQIAEkJDsx7Ov5g51FwHALe+3fzs7n/dfv2Wu71hdfD/rkx2KtLoFAICAAAAAAIRFjOgAAAAAQTRiwAQAAgBBiwAYAAABCKM50AEhVVVV6/vnnVVdXp1dfffUbx30+n9asWaNNmzapsbFRAwYMUE5OjoY...
[ "yes", "no" ]
null
1
science
grade-2
identify-living-and-nonliving-things
true
false
Select the living thing.
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAK8AAADMCAYAAAAF8vOBAAEAAElEQVR4nOz9Z5Rta3aehz0rh51j1a540j3n3Hxvp9sRmQQIokVApi0zWR62ScqUSA9LDn9ky7Ity5Y0ZHsMDw79sIbFYFoiSAMUxSAGNECA6G50uH3TyaFO5Z3D2iuHzz++Xet2ww2rhftHHgO7u+6pqnOqatfac81vzne+7zuVby2FuFOBmsYfPP7g8d/Ih5fDQx8uEmjp8OWm/Lz6B4H7B4//pj9qGtypyPfX+cefV/8gcP/g8f8Pj6s4TcXHn9N/2D/s/0y...
1
math
grade-7
interpret-graphs-of-proportional-relationships
false
true
As a farmer, Hayley keeps a close eye on the weather. After a few stressful weeks with no rain, Hayley was relieved when it started raining one morning. It rained steadily all day, and Hayley periodically checked to see how much rain had fallen. The graph shows the proportional relationship between the amount of time (...
"iVBORw0KGgoAAAANSUhEUgAAAioAAAI0CAYAAAAz7AJYAABVeUlEQVR4nO3deXwV9aH//9fJvgAJkJCNnERQUZRVWSUsVSGEpYIL+Lu2Kopg7XZr+2i/7b29D5dyt1pva+tFFEHv7a0VBStL2FR2QWSVuAGahYRskIRsZ5/fHylRJEgSkzMzyfv5F5lzTvLOMHPOO5+Z+YzDMAwDEREREQsKMTuAiIiIyKWoqIiIiIhlqaiIiIiIZXX5ojJx4kTeeOON5q/ffPNNrr32WgKBgHmhREREpFW6fFEZOnQoeXl5zV8vWbKExx57jJCQLv+...
[ "After 3 hours, a total of 12 inches of rain had fallen.", "After 12 hours, a total of 3 inches of rain had fallen." ]
null
1
math
grade-3
identify-trapezoids
false
true
Is this quadrilateral a trapezoid?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABuCAYAAAAd32REAAALLElEQVR4nO3d629UZQLH8d+ZDu3MtKUdSju1Bi+RsMAGRTRBgy4YMagxiGwwxCUEuWwJSv8YbqFyMyzssrKLQoxKBIVVoiTe2QU0S/BaOr0wvTEzbWfO2RetZ2SjlMt0nplzvp93z0lJfi844ZvJM9RyHMcRAAAAgLwImB4AAAAAeAmBDQAAAOQRgQ0AAADkEYENAAAA5BGBDQAAAOQRgQ0AAADkEYENAAAA5FHwen7ozTd6Fb80qHCYHkdxSaVszftDjab/vsL0FAA...
[ "yes", "no" ]
null
0
math
grade-8
identify-linear-and-nonlinear-functions-graphs-and-equations
false
true
The graph shows a function. Is the function linear or nonlinear?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH8CAYAAADrBti4AABmCElEQVR4nO39f3yU9Z3v/z8nM/mdkIQEkxBMEJFUkET5oYJQobjqinoKrQfbblv3dLu1Z7v9sfvpue2n3z3d0x7XW2+31vazru2x3fZU3eO5deuuWgUjxRKFBgWJECQqxAghIeTH5Mdkfl/z4/r+AYlEQBK53kyGPO63m5K5MtdzXrmumWte8573XOOybdsWAAAAAEdkpLoAAAAA4FJCgw0AAAA4iAYbAAAAcBANNoAxH//4x/Xss8+OXX7uued09dVXK5lMpq4oAAD...
[ "linear", "nonlinear" ]
null
0
technology
grade
web
false
true
What meaning or function is usually associated with this web interface symbol?
"iVBORw0KGgoAAAANSUhEUgAAAV4AAAEsCAYAAACLwdvQAAAL30lEQVR4nO3dP2xV1x3A8R9V1dqlKPIfkLBYgCgdYgkhmanq2B2BGDJkQmLq1C3p1KGwdcoUKVOGDJYRU5fMVQdbQpbSSqlSW5Uso9L3nhURisPiDuXRgA2+ts/93Xfv/XymKNjXB67f18fnnnfvqb29vb0AIM2Pmh4AQN8IL0Ay4QVIJrwAyYQXIJnwAiQTXoBkwguQTHgBkgkvQDLhBUgmvADJhBcgmfACJBNegGTCC5BMeAGSCS9AMuEFSCa8AMmEFyCZ8AIkE16...
[ "Zoom in", "Calendar/Event", "Sort descending", "Link select" ]
null
1
math
pre-k
count-pictures-up-to-5
false
true
How many dinosaurs are there?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAACbCAYAAAAX3e8+AABKaElEQVR4nO3dd3gdeX3o//fM6V29d7lIsi3bkru9bF9YCEsLNRB+JIRAQhqX3NxACuQGckMSSkIgwAXCpZfQlhLK7sJ6d727ttfdclOX1dvpdeb7+0PFli3bsq0jy/Ln9Tz77FqnzJzjt777PXOmaEophRBCCCGEEGJF0G/1CgghhBBCCCEWj0zwhRBCCCGEWEFkgi+EEEIIIcQKIhN8IYQQQgghVhCZ4AshhBBCCLGCyARfCCGEEEKIFUQm+EIIIYQQQqwgMsEXQgg...
[ "2", "4", "1", "5" ]
null
1
math
grade-3
scalene-isosceles-and-equilateral-triangles
false
true
Is this triangle isosceles?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAClCAYAAABm8IozAAAloUlEQVR4nO3da1yUdf7/8RdnBIk8pikRCAhCC2k6piaVp/J8xMEDeVizzXR1yyyPmQphiNaam5F28Jf/NtNStLS0LRPTcc2oVMSVMnQlFRUV4zQz/xtt7JpaHgauAd7Pe1wzXt+3Pbrx5uPM9XGx2+12RERERETEIVyNDiAiIiIiUp2UF+yuXbvSpUsXsrKyjMwjIiIiIlKllRfsnJwcNm/eTEREBI899hhnzpwxMJaIiIiISNVUXrCnT59efvGll14iNDSUtLQ09BF...
[ "yes", "no" ]
null
1
math
kindergarten
represent-numbers-with-pictures-up-to-5
true
false
Which shows 3?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAOAAAADgCAYAAAAaLWrhAAAT8klEQVR4nO3dW4xcd2HH8e+cc+Z+2/vN6931/ZLEiZPGAQFRykVpoKGkgaKWwkOLeCuifWlVlZdKPPDQSqgqQq1UVAkJKG0gIaCKAqGQNCQkJEDAdmxn7d219zJ7n+s5cy59mOyu17u2Q/DO3yG/jxRtZufMzJlZfX2u/zOxKIqiGQ/O1qAcgB8hIjvEiUHehgMZ6E9AbMaNomdXTc+WyJvPPQVwztRaNwYTcCjbqlNEdkY5gNNVmPbg5RpYq37rDsUnsvPydqs...
1
math
precalculus
determine-continuity-using-graphs
false
true
Is f(x) continuous at x= – 1?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH/CAYAAABtkqoWAACAIElEQVR4nO3deXhU5f3+8fdksm8kJBA2E2RVkKAoIptgoWpFrWCtiBuKVG2t3fu1trWbtXbRVqu2dQW3Wv0VtYgRURAQFCRCgICAEQIBspJlksw+8/tjDBLZEjgPJ0Pu13V5OZnM+czNOZkzn3nmOec4wuFwGBERERERsUSM3QFERERERE4marBFRERERCykBltERERExEJqsEWklcWLF9O3b1+mTJkCwGWXXcarr756yMf6/X7OO+88PvzwwxMZUUREpENz6CBHETn...
[ "no", "yes" ]
null
1
math
calculus
describe-linear-and-exponential-growth-and-decay
false
true
How does g(x) change over the interval from x=1 to x=4?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH/CAYAAABtkqoWAAB0gElEQVR4nO3de3wT950v/I8syXcbG1/BYBtCcAPBBoMhEEggkECwoYG0S5on7UlPmgSS9HbObk9fu90+Z7vZbJ7X9nKaJuTSdtNkT5/taZ6SCzaGkEACNQGDAYNNAsRg2QYkWbYs6z6SZp4/jBU7XCzB/DyS/Xn/w8uy5uMvM9LMV1+PZ3SKoiggIiIiIiJVJGhdABERERHRWMIGm4iIiIhIRWywiYiIiIhUxAabiCJ28OBB3HHHHQgEAlf9/l/+8hesW7dulKsiIiK...
[ "g(x) increases by 8", "g(x) increases by 6", "g(x) increases by 200%", "g(x) increases by a factor of 6" ]
null
1
math
grade-5
parts-of-a-circle
false
true
What is \line{GH}?
"iVBORw0KGgoAAAANSUhEUgAAAvgAAADJCAYAAABWm0bCAAAsrklEQVR4nO3dd3hUZaIG8PfMJDOZkEJCSCGVJNQQIFQxQYpUpagIoiBYWFiViy4IXFBkbbC64qJ4rVERFxZFhXUtQYSAwIIiLaGEkkZ6r8xk+v1j5DBjQpMk58zk/T1PHs93zsw5b8z88c7hm28Eq9VqBRERERERuQQ3qQO0BkEQWvT8fI9ERERERHLRJgo+CzgRERERtRUKqQMQEREREVHzUQiCgN27dzc6cOuttyIkJKTR/pycHAiCgHfffRfJyckQBAEmk6nFg95...
[ "chord", "radius", "diameter" ]
null
0
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. Ian often...
"iVBORw0KGgoAAAANSUhEUgAAAUwAAAFOCAYAAADtpiRUAAEAAElEQVR4nOz9d5QlyXnYif4i3fV1y1dXe9/jeixmAMwMxsByABIkLClRAAkeHpASJT3xUdI+vX3csyu32ieRq1097YEISjRLgAIIMwAJkCCAscB41zOD7ulp76q6fNX1aeP9kebmvXVdue7qwXx1sjJvRmZkRGTkF5//xG/91m9J3oa34W14G64h+P3f//2r8lwN4Fvf+KOOFymKEh0LIRr2/g8N8PGuUNygXEbnJC5CCBzbQ1VVdN2gWq3iupJcNs877ng3tZrFa6+...
[ "the type of food used in the bird feeders", "the number of woodpeckers that visited the bird feeders" ]
null
1
math
kindergarten
select-two-dimensional-shapes
true
false
Which shape is a circle?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAJgAAACaCAYAAABVCoEqAAAD3ElEQVR4nO3az04TURTH8V9bYIGgKzUuXaiPwIP5jprwBoh7caWh0ASkGRcjyr9i6dwz95xzv99VJ5M0Z/HJdHrvnXRd151cSl8X0nwpXXUi2ritibQ/k97tSq93pMnJRdcdntYeizJ28FzaOl70F292pA/Pen1EmzZfSkfn0rdL6ctCmp5e9TfARSXan/WWJOlsKU2XN24Qleja0q9OmtYdhbIHMDINYGQawMg0gJFpACPTAEamAYxMAxiZBjAyDWBkGsDItMH...
2
math
grade-5
angles-of-90-180-270-and-360-degrees
false
true
What fraction of a turn is this angle?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAABwCAYAAAAkAwevAAAEuklEQVR4nO3dMWjUdxjH4e8VF5Ug1IAGYiarYB0ancxRskSoyVIXc2MHmwyFdtPFLu0kCnYoHap2VpeAQxzqooNONkMnO6aCCjqkkXS8DmpISNRoX+5y+jxbfrnhJVk+9+P93zXa7XY7AABAiY+6PQAAALxPBDYAABQS2JvIk/mHOXf8m9y5OtvtUQAAeEcNO9ibx5UzF3Lz4rUkyc49A2m2JjJyYjz9QwNdngwAgI1aN7DnZm/l+vnLWfrnWVo/fJfh8dFuzPbBWVp...
[ "1/2", "1/4", "1 full turn", "3/4" ]
null
1
math
kindergarten
represent-numbers-with-pictures-up-to-5
true
false
Which shows 5?
null
null
[ "iVBORw0KGgoAAAANSUhEUgAAAOAAAADgCAYAAAAaLWrhAAAiRklEQVR4nO3deWwc533/8ffM3ge5u7xvipIoWaRIS7ROWz7SODEaH2mS1padFkkRBC5aoEiTP4LYQdMkQIIkTX9og6ZOGhdRYcQJ0jatjzpxGjuWYFm2JNsUSVEmxZviudzl3tfszO8Pyoysg5IViUPtfl+AIIrzzDzfHeiDZ46dZxTDMIyZLJxOQiwPmoEQ4jqxKlBigVY3VNtBmckYxhtRs8sSovjsLgXrYHLpH7V22OxZSqcQ4vqI5eGdBExnYSAJalRbWiD...
1
math
algebra-1
domain-and-range-of-absolute-value-functions-graphs
false
true
What is the domain of this function?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAH8CAYAAADrBti4AABk80lEQVR4nO39f3ycdZ3v/z8nM5PfaZMmbVLSJqWUVluaQqFASyuwILCiaKtu0eMPXHYVV9R1v8dz87tf9Ox6+HD8HEVvctB1dT2C+9nPceUI7LY1rUUKra20ENq0CQgltGnSNj8mP2cyP66Zua7vH3WyCf2RmfZ6ZzLJ4367ecOZzvXMK9c1857XvObKjMdxHEcAAAAAXJGX7QIAAACA6YQGGwAAAHARDTYAAADgIhpsAOPU1tZq3759o5ePHTumuXPnqr29PYtVAQC...
[ "$\\{x \\mid x \\leq 0\\}$", "all real numbers", "$\\{x \\mid x \\leq 2\\}$", "$\\{x \\mid x \\geq 2\\}$" ]
null
1
math
grade-6
quadrants
true
true
Which shape is in Quadrant III?
"iVBORw0KGgoAAAANSUhEUgAAAfkAAAH8CAYAAADSe9ZXAAA5eElEQVR4nO3de3BU92H28WelRUISkpAQIIFBvnGxsczN3BExwUyxcfGV8TB2Eo/dTMlMXjypJzMuTTOpJ6bOdJzYxHEbWr8mrd3kNQN1Q8AlYBtkYSwLAghxCeBYgIWEJFaXlVa7q728f6irIINgBTp79vz0/fzlPVqd8/jH6jz7O+fsWVc0Go0KAAAYJ8XuAAAAwBqUPAAAhqLkAQAwFCUPAIChKHkA+vWvf629e/f2PA6FQvrxj38sn89nYyoAN4qSBwy3ceNGbdy...
null
[ "iVBORw0KGgoAAAANSUhEUgAAApcAAAH8CAYAAACEt4SVAAA/DUlEQVR4nO3deXAU94H3/89Ig4QkJCEhQAKD4oPDxjKXuQ+bYGqxcfBJuXhwEped1DpVeXBlXfk9Xm82lXXFrFNbTmzieDfe9WOyGyd5TEGyIeAlxjZgYSwLAojDBHAswEIgidEx0lyamf79oYyMkIRmoHt6evR+VbnCtGZ6PvvdVs9H3z7GZRiGIQAAkHZcLpfdETAIZdgdAAAAAOmDcgkAAADTUC4BAABgGsolAAAATEO5BKBf//rX2rNnT/fjcDisH/7wh/L...
3
math
grade-3
identify-parallelograms
false
true
Is this quadrilateral a parallelogram?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAB7CAYAAABOxPdsAAARAklEQVR4nO3df3DU9Z3H8dd3s9lswmYTLhWuuTn09LSMVutgHRltdRjqDHT8ARiIwEH5UamE5od46tVT/1DqjXLF/NDUH0UoFCGSAlanMKOOo6cOjMpgvXZoGRlhxnjBZkK+WZLNZrPf+yPZ/SYhyHfJbr67yfPx3+c7ZOYt7I6vfeW9369hWZYlAAAAACnhcXsAAAAAYDwhYAMAAAApRMAGAAAAUoiADQAAAKQQARsAAABIIQI2AAAAkEIEbAAAACCFvE7+0IZ93Tr...
[ "yes", "no" ]
null
0
math
grade-5
scalene-isosceles-and-equilateral-triangles
false
true
What kind of triangle is this?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAADOCAYAAAAEw3WqAAAnBUlEQVR4nO3de3SU9b3v8c+QCWN0jAyiUUMIxEKUKLeSIAlCjIbSZre7OXtZ2bvubBebtLYH0B6i1loVt3J2ldrjKeecWtrucnQ3W2TtQ6CETCAkhlyMEC4RIiDXSCDcQiBXksnkOX+MTE1BhGSSZy7v11pdq/gk8/vw34dnfef3tRiGYQgAAACATwwxOwAAAAAQTCjYwBVUV1frtddeU0pKiiwWi/7jP/7D7EgAACBAWM0OAPiDs2fPyul0qrCwUE6nU2fPnu31/OD...
[ "isosceles but not equilateral", "scalene", "equilateral" ]
null
2
math
grade-8
compare-and-order-integers
false
true
Compare the numbers. Pick the correct sign. 6 ?3 You can use the number line to help.
"iVBORw0KGgoAAAANSUhEUgAAAlwAAAApCAYAAADgbPfrAAAJq0lEQVR4nO3deUgUbxgH8K+lW2qW1loZaQcdYBd2eCRGFpRURqtRCVKBUFJQEIVBEBQiRYckFRVqVhBRWGGYWX/EZoZnZmqCBplZtGkH5rG7bvr7I3Z/HrO6a+nsO30//+3s6PNML8/7Ps5MM05dXV1dUJCbN2/CyckJMTExjMEYjMEYjMEYjMEYDsFZ7gT+tg8fPjAGYzAGYzAGYzAGYzgUmxuujo4OlJaWorCwEBMnTlRMx0lERERkr5s3b6KxsRFBQUFYsmQJXFx...
[ ">", "=", "<" ]
null
0
math
algebra-1
identify-linear-and-exponential-functions-from-tables
false
true
Is this function linear or exponential?
"iVBORw0KGgoAAAANSUhEUgAAAtgAAAEqCAYAAAAvYSeKAAAgh0lEQVR4nO3de1RVZeL/8Q93URAzLiJmoPYVsVBMzYbUCi8tG1caouAt1LBw6ajjqOioKSsvCN6on9L0Q8eScmLMJo2MtEjXuCC/jaaNohmk4yXB8ALkBQ7+/mh5fnPCOw/C0fdrLdeK5+z97Ofprzd77bNxyB969IrsQPNFTXUioaSul1Hr2mY8VNdLAAAAQA041vUCAAAAgHsJgQ0AAAAYRGADAAAABhHYAAAAgEEENgAAAGAQgQ0AAAAYRGADAAAABhHYAAAAgEE...
[ "linear", "exponential" ]
null
1
math
grade-2
identify-the-fraction
false
true
What fraction of the shape is blue?
"iVBORw0KGgoAAAANSUhEUgAAAQQAAABkCAYAAABgi07kAAAnnUlEQVR4nO2deXxc5XX3v3dWjWY00mjfd1m2ZWRblhdWg8ExGLOlISlL2BJC4gaSNgnvm6Y0NEkTUiiFJiVNKFmgvDQhkAUwGPC+YBtbkiXZ8iJZkrWvs2hGs899/7gzI8nWNtJIFs39/iNrZu7zPOOP7rnnOed3ziOIoigiIyMjA6gu9QKmwun2c6Z9iIEhD1a7F7Pdg9XhxWL3YLF7sTi89FvdaFQK9DFK9DEqjHo1xlg1qQlaUhNi6Da7uHltBrmpsZf668jILGi...
[ "3/11", "6/9", "7/12", "6/12" ]
null
3
science
grade-4
predict-temperature-changes
true
true
Two identical blocks are heated to different temperatures. The blocks are placed so that they touch each other. Heat can flow from one block to another but cannot escape from the blocks. Later, the temperature of each block is measured again. Which pair of temperatures is possible?
"iVBORw0KGgoAAAANSUhEUgAAAQQAAACgCAYAAADq8hJGAAAYFUlEQVR4nO3d6Vcd953n8XfVXeGyCQFiF6DFMtaKpFje1IllTdyxE0+c4/gk3Z30g/Q8nHkyf8D8C/NwTs6Z0xNPuk/GdmKnHVlKy7balrUjBFrRwqYrdhCXy91rmQfFLUAXIZARVcD39cRWcZe691f3U/X71q/qp5imaSKEEIDq9AoIIdxDAkEIYZNAEELYJBCEEDYJBCGETQJBCGGTQBBC2CQQhBA2CQQhhE0CQQhhk0AQQtgkEIQQNgkEIYRNAkEIYfM6vQLLIZU...
null
[ "iVBORw0KGgoAAAANSUhEUgAAAiAAAAC4CAYAAADaI1cbAAAhpUlEQVR4nO3d6VcbZ74n8G+VViQ2Y8CIzYDXEO82sZPY7u44uZ3O0ukk42TSnU7mRe68vHPOnHk798zbmf9gTs65Z6bTffv0JN2drRO7r7PcxCs2tsELxmAWWQaBAEsI7bXMi0ICDLaFLapK0vfzhqSMpAfq0ZdfVf30lABABRERAFVV4U8CA1EgLAMS04GIcsQqAGUWYJMLWGcHBLAAIaI5/oSKzhmjR0FEhW5/OWA1ehBEZB79Ue2rxw5scWtHK0REuRCWgb4...
0