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5 values
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stringlengths
6
18
question
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stringclasses
5 values
science_train
science_train_3249
Question: Will these magnets attract or repel each other? Hints:
[ "attract", "repel" ]
A
sciq
sciq_4
What is the layman's term for mammals raising their hair with tiny muscles in the skin, something that is automatic in humans sensing cold?
[ "spine tingling", "follicles", "hypothermia", "goosebumps" ]
D
aqua_train
aqua_train_69190
Right triangleXYZ is the base of the prism in the figure above. If XY=XZ√4 and the height of the prism is 5, what is the volume of the prism?
[ "A)15/2", "B)6", "C)4", "D)2/5", "E)6/8" ]
A
aqua_train
aqua_train_91242
[(5/2 ÷ 1/2 × 5/2)]/[(5/2 × 1/2 ÷ 5/2)] = ?
[ "A)25", "B)20", "C)18", "D)16", "E)14" ]
A
sciq
sciq_4
Most arthropods are insects. the phylum also includes spiders, centipedes, and what?
[ "amphibians", "crystals", "coral", "crustaceans" ]
D
aqua_train
aqua_train_24723
Tom and Beth each drove from Smallville to Crown City by different routes. Tom drove an an average speed of 40 miles per hour and completed the trip in 30 minutes. Beth's route was 5 miles longer, and it took her 20 minutes more than Tom to complete the trip. How many miles per hour was Beth's average speed on this tri...
[ "A) 24", "B) 30", "C) 48", "D) 54", "E) 75" ]
B
aqua_train
aqua_train_37027
An empty fuel tank is filled with brand Z gasoline. When the tank is 1/4 empty, it is filled with brand Y gasoline. When the tank is half empty again, it is filled with brand Z gasoline. When the tank is half empty again, it is filled with brand Y gasoline. At this time, what percent of the gasoline in the tank is bran...
[ "A)31.25%", "B)30%", "C)40%", "D)50%", "E)45%" ]
A
aqua_train
aqua_train_11366
If a and b are integers and (a*b)^5 = 128y, y could be:
[ "A)1", "B)2", "C)4", "D)8", "E)16" ]
D
aqua_train
aqua_train_70783
A man can row upstream at 25 kmph and downstream at 37 kmph, and then find the speed of the man in still water?
[ "A)65", "B)86", "C)30", "D)78", "E)31" ]
E
aqua_train
aqua_train_3374
A can do a job in 9 days and B can do it in 27 days. A and B working together will finish twice the amount of work in ------- days?
[ "A)22 days", "B)18 days", "C)22 6/2 days", "D)27 days", "E)9 days" ]
B
science_train
science_train_2310
Question: Using only these supplies, which question can Edna investigate with an experiment? Hints:
[ "Does the basketball bounce higher on gravel or on grass?", "Do larger basketballs bounce higher than smaller basketballs on a brick patio?", "Does the basketball bounce higher on a lawn or on a dirt path?" ]
A
aqua_train
aqua_train_30345
In a question on division with zero remainder, a candidate took 22 as divisor instead of 11. The quotient obtained by him was 35. The correct quotient is?
[ "A)A)70", "B)B)24", "C)C)28", "D)D)29", "E)E)30" ]
A
aqua_train
aqua_train_88144
A, B and C are partners. A receives 2/3 of profits, B and C dividing the remainder equally. A's income is increased by Rs.200 when the rate to profit rises from 5 to 7 percent. Find the Capital of B?
[ "A)2500", "B)3000", "C)3500", "D)4000", "E)4500" ]
A
aqua_train
aqua_train_8082
How many 3 digit integers can be chosen such that none of the digits appear more than twice and none of the digits equal zero ?
[ "A)729", "B)720", "C)648", "D)640", "E)57" ]
B
sciq
sciq_4
An aquifer is an underground layer of rock that is saturated with what?
[ "ocean water", "wastewater", "oil", "groundwater" ]
D
aqua_train
aqua_train_22161
19 5 17 = x 65 8 10 = y What will be the value of x + y?
[ "A)189", "B)129", "C)69", "D)169", "E)179" ]
B
aqua_train
aqua_train_40220
The cost price of an book is 64% of the marked price. Calculate the gain percent after allowing a discount of 12%?
[ "A)33%", "B)28.02%", "C)37.5%", "D)30.5%", "E)22%" ]
C
aqua_train
aqua_train_33313
The area of a rectangle is x2 + 4x -12. What are the dimensions of the rectangle (length and width)?
[ "A)x + 6 ", "x + -2", "B)x + 7 ", "x + -2", "C)x + 8 ", "x + -2", "D)x + 9 ", "x + -2", "E)none" ]
A
aqua_train
aqua_train_90314
If a function f is defined by f(x)= -1/x for all non zero numbers x. If f(a) = -1/3 and f(ab) = 1/9 then b= ?
[ "A)1/6.", "B)-1/3.", "C)1/3.", "D)-3.", "E)12." ]
D
aqua_train
aqua_train_88324
The speed at which a man can row a boat in still water is 22 kmph. If he rows downstream, where the speed of current is 3 kmph, what time will he take to cover 80 metres?
[ "A)12.59", "B)11.53", "C)15.69", "D)14.56", "E)18.98" ]
B
aqua_train
aqua_train_16474
If log 32 x= 0.8, then x is equal to
[ "A)25.6", "B)16", "C)10", "D)12.8", "E)None" ]
B
aqua_train
aqua_train_93094
A searchlight on top of the watch-tower makes 3 revolutions per minute. What is the probability that a man appearing near the tower will stay in the dark for at least 15 seconds?
[ "A)1/4", "B)1/3", "C)1/2", "D)2/3", "E)3/4" ]
A
aqua_train
aqua_train_14031
The difference between compound and simple interest on a certain sum of money for 3 years at 6 2/3% p.a is Rs.184. Find the sum?
[ "A)28882", "B)27772", "C)23123", "D)13500", "E)28811" ]
D
aqua_train
aqua_train_92528
In one hour, a boat goes 11km along the stream and 5 km against it. Find the speed of the boat in still water
[ "A)6", "B)7", "C)8", "D)9", "E)10" ]
C
aqua_train
aqua_train_50416
Three numbers are in the ratio 4 : 5 : 6 and their average is 42 . The largest number is:
[ "A)28", "B)32", "C)36", "D)50.4", "E)45" ]
D
aqua_train
aqua_train_91923
If the a radio is sold for Rs 490 and sold for Rs 465.50.find loss%.
[ "A)4%", "B)5%", "C)6%", "D)3%", "E)5.5%" ]
B
aqua_train
aqua_train_88446
The length of the rectangular field is double its width. Inside the field there is square shaped pond 7m long. If the area of the pond is 1/8 of the area of the field. What is the length of the field?
[ "A)54", "B)32", "C)75", "D)28", "E)11" ]
D
aqua_train
aqua_train_53817
A hare and a tortoise have a race along a circle of 100 yards diameter. The tortoise goes in one direction and the hare in the other. The hare starts after the tortoise has covered 1/5 of its distance and that too leisurely. The hare and tortoise meet when the hare has covered only 1/8 of the distance. By what factor s...
[ "A)37.9", "B)37.2", "C)37.1", "D)37.82", "E)37.8" ]
E
aqua_train
aqua_train_86486
A train 110 meters long completely crosses a 280 meters long bridge in 38 seconds. What is the speed of the train is?
[ "A)32", "B)45", "C)40", "D)66", "E)09" ]
C
aqua_train
aqua_train_26764
24 oz of juice P and 25 oz of juice V are mixed to make smothies R and Y . The ratio of p to V in smothie R is 4 is to 1 and that in Y is 1is to 5.How many ounces of juice P are contained in the smothie R?
[ "A)5", "B)10", "C)15", "D)20", "E)25" ]
D
ds_train
ds_train_725
Which of the following hosts is typically involved in the lifecycle of a Plasmodium species, responsible for causing malaria in humans?
[ "A. Snail\nB. Mosquito\nC. Fish\nD. Mammal other than humans" ]
B
aqua_train
aqua_train_59156
A towel, when bleached, lost 20% of its length and 10% of its breadth. What is the percentage decrease in area?
[ "A)26", "B)28", "C)24", "D)20", "E)22" ]
B
aqua_train
aqua_train_40184
Of the 400 employees in a certain company, 25 percent will be relocated to City X and the remaining 75 percent will be relocated to City Y. However, 40 percent of the employees prefer City Y and 60 percent prefer City X. What is the highest possible number of employees who will be relocated to the city they prefer?
[ "A) 65", "B) 100", "C) 115", "D) 130", "E) 260" ]
E
aqua_train
aqua_train_35829
A beaker contains 180 lts of wine. Each day 60lts of wine is replaced with same amount of water what is the amount of wine after 3 days?
[ "A)160/3", "B)170/3", "C)180/3", "D)190/3", "E)200/3" ]
A
aqua_train
aqua_train_46370
The average weight of 20 persons sitting in a boat had some value. A new person added to them whose weight was 48 kg only. Due to his arrival, the average weight of all the persons decreased by 5 kg. Find the average weight of first 20 persons?
[ "A)55", "B)56", "C)57", "D)58", "E)59" ]
C
aqua_train
aqua_train_79394
One millisecond is 0.001 of a second. The costs for a single run of a computer program are $1.04 for operating-system overhead, $0.023 per millisecond of computer time, and $4.35 for the mounting of a data tape. What is the total of these three costs for 1 run of a program that requires 1.5 seconds of computer time ?
[ "A) $39.89", "B) $48.87", "C) $58.96", "D) $65.57", "E) $69.92" ]
A
aqua_train
aqua_train_32318
Bookman purchased 55 copies of a new book released recently, 10 of which are hardback and sold for $20 each, and rest are paperback and sold for $10 each. If 14 copies were sold and the total value of the remaining books was 460, how many paperback copies were sold?
[ "A)10", "B)11", "C)12", "D)13", "E)9" ]
E
aqua_train
aqua_train_58223
The length W of a rectangle is decreased by 15% and its width is increased by 40%. Does the area of the rectangle decrease or increase and by what percent?
[ "A)Decreases by 19%", "B)Decreases by 25%", "C)Increases by 6%", "D)Increases by 19%", "E)Increases by 25%" ]
D
aqua_train
aqua_train_44570
What is the present worth of Rs. 132 due in 2 years at 5% simple interest per annum?
[ "A)277", "B)278", "C)120", "D)276", "E)298" ]
C
aqua_train
aqua_train_65749
In a bag, there are coins of 25 p, 10 p and 5 p in the ratio of 1 : 2 : 3. If there is Rs. 30 in all, how many 5 p coins are there?
[ "A)100", "B)150", "C)50", "D)250", "E)75" ]
B
aqua_train
aqua_train_81668
In right triangle ABC, AC is the hypotenuse. If AC is 40 and AB + BC = 60, what is the area of the triangle ABC?
[ "A)225", "B)450", "C)25√2", "D)500", "E)200√2" ]
D
sciq
sciq_4
The rate at which the body uses food energy to sustain life and to do different activities is called the what?
[ "hormonal rate", "calorie rate", "life cycle", "metabolic rate" ]
D
aqua_train
aqua_train_6294
A box contains eight bulbs out of which three are defective. If three bulbs are chosen at random, find the probability that all the three bulbs are defective?
[ "A)1/56", "B)1/22", "C)1/29", "D)1/36", "E)1/12" ]
A
sciq
sciq_4
Electromagnets can be turned on or off and their strength can be changed by controlling what?
[ "steady current", "powered current", "inducing current", "electric current" ]
D
science_train
science_train_2062
Question: Is pumice a mineral? Hints:
[ "no", "yes" ]
A
aqua_train
aqua_train_33292
Two pipes A and B can fill a tank in 4 and 5 hours respectively. If they are turned up alternately for one hour each, the time taken to fill the tank is?
[ "A)4 hrs 29 min", "B)4 hrs 24 min", "C)4 hrs 84 min", "D)3 hrs 24 min", "E)7 hrs 24 min" ]
B
aqua_train
aqua_train_49785
A man spends 10% of his income in house rent, 20% of the rest on his children’s education, 25% of the rest miscellaneous causes. If he now posses Rs. 1944 then his income is?
[ "A)3600", "B)2992", "C)2209", "D)2889", "E)7881" ]
A
aqua_train
aqua_train_19571
In a graduating class, 40 percent of the students are male. In this class, 60 percent of the male students and 40 percent of the female students are 25 years old or older. If one student in the class is randomly selected, approximately what is the probability that he or she will be less than 25 years old?
[ "A)0.4", "B)0.44", "C)0.48", "D)0.52", "E)0.56" ]
D
sciq
sciq_4
Before the atmosphere became oxygenated, the planet was subjected to what harmful energy source, meaning the first organisms would have flourished where they were more protected?
[ "evaporation", "conduction", "convection", "radiation" ]
D
aqua_train
aqua_train_37143
A family consists of grandparents, parents and three grandchildren. The average age of the grandparents is 67 years, that of the parents is 35 years and that of the grandchildren is 6 years. What is the average age of the family?
[ "A)31 5/8 years", "B)31 5/7 years", "C)31 9/7 years", "D)38 5/7 years", "E)31 5/4 years" ]
B
aqua_train
aqua_train_26039
How long does a train 110 m long traveling at 36 kmph takes to cross a bridge of 170 m in length?
[ "A)28", "B)16.0", "C)16.4", "D)16.8", "E)16.1" ]
A
aqua_train
aqua_train_83555
The average height of 15 girls out of a class of 60 is 138 cm. and that of the remaining girls is 142 cm. The average height of the whole class is :
[ "A)132 cms", "B)141 cms", "C)142 cms", "D)152 cms", "E)161 cms" ]
B
aqua_train
aqua_train_71418
A man can row 7 ½ kmph in still water.if in a river running at 1.5 km/hr an hour,it takes him 50 minutes to row to a place and back,how far off is the place?
[ "A)4 km", "B)2 km", "C)5 km", "D)3 km", "E)1 km" ]
D
aqua_train
aqua_train_85833
Find the area of a rhombus one side of which measures 20 cm and one diagonal is 24 cm.
[ "A)370 cm2", "B)365 cm2", "C)380 cm2", "D)384 cm2", "E)394 cm2" ]
D
aqua_train
aqua_train_11309
John distributes his pencil among his 4 friends Rose, Mary, Ranjan, and Rohit in the ratio 1/5 : 1/3 :1/4:1/5 . What is the minimum no. of pencils that the person should have?
[ "A)59", "B)65", "C)70", "D)77", "E)98" ]
A
aqua_train
aqua_train_67523
The average age 12 monkeys in a tree is 16 years. Out of these, the average age of 6 monkeys is 18 years and that of the other 6 monkeys is 13 years. The age of the 12th monkey is?
[ "A)10", "B)9", "C)4", "D)6", "E)7" ]
D
aqua_train
aqua_train_28388
A committee has 4 men and 7 women. What are the number of ways of selecting 2 men and 4 women from the given committee?
[ "A)125", "B)150", "C)180", "D)210", "E)225" ]
D
science_train
science_train_130
Question: Does this passage describe the weather or the climate? Hanson enjoys the cool evening breezes that are common on summer evenings where he lives. Hints:
[ "weather", "climate" ]
B
aqua_train
aqua_train_45474
A train covers a certain distance at a speed of 200kmph in 4 hours. To cover the same distance in 2 hours, it must travel at a speed of
[ "A)400 km/hr", "B)420 km/hr", "C)450 km/hr", "D)470 km/hr", "E)580 km/hr" ]
A
aqua_train
aqua_train_45002
The average of 11 numbers is 10.9. If the average of first six is 10.5 and that of the last six is 11.5 the sixth number is?
[ "A)11.4", "B)11.3", "C)11.8", "D)12.1", "E)11.1" ]
D
aqua_train
aqua_train_80299
A train speeds past a pole in 15 seconds and a platform 100 m long in 25 seconds. Its length is?
[ "A)287 m", "B)287 m", "C)288 m", "D)150 m", "E)287 m" ]
D
aqua_train
aqua_train_19158
Pipe A can fill a tank in 6 minutes and pipe B cam empty it in 24 minutes. If both the pipes are opened together after how many minutes should pipe B be closed, so that the tank is filled in 30 minutes?
[ "A)18", "B)27", "C)96", "D)27", "E)21" ]
C
aqua_train
aqua_train_88249
Sonika deposited Rs.8000 which amounted to Rs.9200 after 3 years at simple interest. Had the interest been 2% more. She would get how much?
[ "A)9680", "B)4280", "C)2789", "D)7892", "E)2792" ]
A
aqua_train
aqua_train_8713
The H.C.F. of two numbers is 20 and the other two factors of their L.C.M. are 13 and 14. The larger of the two numbers is:
[ "A)276", "B)299", "C)322", "D)345", "E)280" ]
E
aqua_train
aqua_train_43116
In what ratio should two varieties of sugar of Rs.18 per kg and Rs.24 kg be mixed together to get a mixture whose cost is Rs.20 per kg?
[ "A)2:1", "B)1:2", "C)1:5", "D)5:1", "E)4:3" ]
A
aqua_train
aqua_train_16213
A walks around a circular field at the rate of one round per hour while B runs around it at the rate of five rounds per hour. They start in the same direction from the same point at 7.30 a.m. They shall first cross each other after___ minutes?
[ "A)11 min", "B)12 min", "C)10 min", "D)15 min", "E)16 min" ]
D
aqua_train
aqua_train_56259
If the quantity 8^2+ 8^4 + 8^6 is written as (a + b)(a – b), in which both a and b are integers, which of the following could be the value of b?
[ "A)51", "B)64", "C)49", "D)29", "E)37" ]
B
aqua_train
aqua_train_10174
Riya and Priya set on a journey. Riya moves eastward at a speed of 25kmph and Priya moves westward at a speed of 40 kmph.How far will be priya from Riya after 15 minutes
[ "A)18kms", "B)16kms", "C)50kms", "D)30kms", "E)40kms" ]
B
aqua_train
aqua_train_21601
A car going at 40 miles per hour set out on an 60-mile trip at 9:00 A.M. Exactly 10 minutes later, a second car left from the same place and followed the same route. How fast, in miles per hour, was the second car going if it caught up with the first car at 10:30 A.M.?
[ "A) 45", "B) 60", "C) 53", "D) 55", "E) 50" ]
B
aqua_train
aqua_train_82608
A fair coin is tossed 5 times. What is the probability of getting at least three heads on consecutive tosses? .
[ "A)2/16", "B)1/4", "C)7/24", "D)5/16", "E)15/32" ]
B
aqua_train
aqua_train_25862
If two sides of a triangle have lengths 6 and 8, which of the following could be the perimeter of the triangle? I. 9 II. 16 III. 19
[ "A)None", "B)I only", "C)II only", "D)III only", "E)I", "II", "and III" ]
D
aqua_train
aqua_train_12200
A train speeds past a pole in 15 sec and a platform 140 m long in 25 sec, its length is?
[ "A)50 m", "B)150 m", "C)210 m", "D)300 m", "E)None of these" ]
C
aqua_train
aqua_train_6541
If N = 16 × 10^(-p) and −4 < p < 4, how many different integer values of p will make N a perfect square?
[ "A)0", "B)2", "C)3", "D)5", "E)7" ]
C
aqua_train
aqua_train_22425
Out of 10 students in a class, 4 are from Maharashtra, 3 are from Karnataka, and 3 are from Goa. Four students are to be selected at random. What are the chances that at least one is from Karnataka?
[ "A)1/3", "B)4/9", "C)5/6", "D)3/7", "E)1/4" ]
C
sciq
sciq_4
What can help scientist gather information for an investigation?
[ "variables", "controls", "conclusions", "observations" ]
D
aqua_train
aqua_train_96229
A train passes a station platform in 34 sec and a man standing on the platform in 20 sec. If the speed of the train is 54 km/hr. What is the length of the platform?
[ "A)228", "B)240", "C)887", "D)166", "E)210" ]
E
aqua_train
aqua_train_68658
In a recent head-to-head run-off election, 15,000 absentee ballets were cast. 1/5 of the absentee ballets were thrown out and 1/4 of the remaining absentee ballets were cast for Candidate A. How many absentee votes did Candidate B receive?
[ "A)2,000", "B)3,000", "C)6,000", "D)8,000", "E)9,000" ]
E
science_train
science_train_821
Question: During this time, thermal energy was transferred from () to (). Hints:
[ "each battery . . . the surroundings", "the surroundings . . . each battery" ]
A
ds_train
ds_train_285
Considering a lens system, which type of optical aberration causes different colors (wavelengths) of light to be focused at different positions and results in color fringing around objects?
[ "A. Spherical Aberration\nB. Comatic Aberration\nC. Chromatic Aberration\nD. Astigmatism" ]
C
aqua_train
aqua_train_54700
Find large number from below question The difference of two numbers is 1000. On dividing the larger number by the smaller, we get 10 as quotient and the 10 as remainder
[ "A)1234", "B)1110", "C)1456", "D)1200", "E)1600" ]
B
aqua_train
aqua_train_95648
This topic is locked. If you want to discuss this question please re-post it in the respective forum. If y ≠ 3 and 3w/y is a prime integer greater than 2, which of the following must be true? I. w = y II. y = 1 III. w and y are prime integers.
[ "A) None", "B) I only", "C) II only", "D) III only", "E) I and III" ]
A
aqua_train
aqua_train_76217
A man spends 10% of his income in house rent, 20% of the rest on his children’s education, 25% of the rest miscellaneous causes. If he now posses Rs. 1944 then his income is?
[ "A)3600", "B)5500", "C)5000", "D)4000", "E)2000" ]
A
sciq
sciq_4
The presence of what, which acts as a trigger, affects the rate of chemical reaction?
[ "friction", "heat", "light", "catalyst" ]
D
aqua_train
aqua_train_31260
The value of (.02)2 + (0.52)2 + (0.035)2/ (0.002)2 + (0.052)2 + (0.0035)2
[ "A)100", "B)1000", "C).001", "D).0001", "E).01" ]
A
aqua_train
aqua_train_50795
It being given that √ 15 = 3.88, the best approximation to √5/3 is
[ "A)0.43", "B)1.89", "C)1.29", "D)1.63", "E)1.54" ]
C
aqua_train
aqua_train_35119
What is the sum of the multiples of 4 from 40 to 80, inclusive?
[ "A)560", "B)660", "C)800", "D)760", "E)480" ]
B
sciq
sciq_4
Pluto's orbit is so elliptical that sometimes it is inside the orbit of which planet?
[ "titan", "Mars", "Earth", "neptune" ]
D
aqua_train
aqua_train_72329
Find a sum for 1st 4 prime number's?
[ "A)25", "B)17", "C)30", "D)34", "E)36" ]
B
aqua_train
aqua_train_12141
If a card is drawn from a well shuffled pack of cards, the probability of drawing a spade or a king is?
[ "A)4/16", "B)4/19", "C)4/12", "D)4/13", "E)4/11" ]
D
aqua_train
aqua_train_63140
How many two-element subsets of {2,4,6,8} are there that do not contain the element 4?
[ "A)1", "B)2", "C)3", "D)4", "E)5" ]
C
aqua_train
aqua_train_65589
Two numbers are in the ratio 3:5. If 9 is subtracted from each, the new numbers are in the ratio 12:23. The smaller number is:
[ "A)15", "B)33", "C)58", "D)56", "E)91" ]
B
aqua_train
aqua_train_7905
g(x) is defined as the product of all even integers k such that 0 < k ≤ x. For example, g(14) = 2 × 4 × 6 × 8 × 10 × 12 × 14. If g(a) is divisible by 4^11, what is the smallest possible value for a?
[ "A) 22", "B) 24", "C) 28", "D) 32", "E) 44" ]
B
aqua_train
aqua_train_38732
A and B together can do a piece of work in 6 days and A alone can do it in 9 days. In how many days can B alone can do it?
[ "A)12 days", "B)15 days", "C)18 days", "D)21 days", "E)22 days" ]
C
science_train
science_train_6357
Question: Select the invertebrate. Hints:
[ "jumping spider", "asp viper", "sheep", "harbor seal" ]
A
sciq
sciq_4
When a rock is altered by heat from a nearby magma, what occurs?
[ "sublimation", "evaporation", "form metamorphism", "contact metamorphism" ]
D
aqua_train
aqua_train_94630
What is the area of a square field whose sides have a length of 12 meters?
[ "A)225 sq m", "B)126 sq m", "C)144 sq m", "D)267 sq m", "E)231 sq m" ]
C
aqua_train
aqua_train_41809
Find: S.l on Rs 68000 at 16 2/3%per annum for 9 months
[ "A)6500", "B)7500", "C)8500", "D)9500", "E)9000" ]
C
aqua_train
aqua_train_85226
In a 1000 m race, A beats B by 70 m and B beats C by 100 m. In the same race, by how many meters does A beat C?
[ "A)145 m", "B)176 m", "C)168 m", "D)163 m", "E)218 m" ]
D
aqua_train
aqua_train_61589
y =2x^2 +2bx + 512 cuts the x axis at (h, 0) and (k, 0). If h and k are integers, what is the least value of b?
[ "A)256", "B)-256", "C)-128", "D)-64", "E)-257" ]
E
aqua_train
aqua_train_35665
Two trains of length 100 m and 120 m are running towards each other on parallel lines at 42 kmph and 30 kmph respectively. In what time will they be clear of each other from the moment they meet?
[ "A)11 sec", "B)70 sec", "C)21 sec", "D)20 sec", "E)19 sec" ]
A