Cheukting/mathqa huggingface dataset:
Question (other): a person want to give his money of $ 4500 to his 3 children a , b , c in the ratio 2 : 3 : 4 . what is the b ' s share ?
Options: a ) $ 2000 , b ) $ 1500 , c ) $ 2500 , d ) $ 1800 , e ) $ 1600
Rationale: b ' s share = 4500 * 3 / 9 = $ 1500 answer is b
Answer: b
Question (general): how many integers between 100 and 180 , inclusive , can not be evenly divided by 3 nor 5 ?
Options: a ) 39 , b ) 41 , c ) 43 , d ) 45 , e ) 47
Rationale: "the total numbers between 100 and 180 , inclusive , is 81 . 3 * 34 = 102 and 3 * 60 = 180 so the number of multiples of 3 is 27 . 5 * 20 = 100 and 5 * 36 = 180 so the number of multiples of 5 is 17 . however , the multiples of 15 have been counted twice . 15 * 7 = 105 and 15 * 12 = 180 so the number of multiples of 15 is 6 . thus the total number is 81 - 27 - 17 + 6 = 43 . the answer is c ."
Answer: c
Question (physics): what is the least number of squares tiles required to pave the floor of a room 2 m 42 cm long and 1 m 76 cm broad ?
Options: a ) 88 , b ) 82 , c ) 84 , d ) 44 , e ) 54
Rationale: "length of largest tile = h . c . f . of 242 cm and 176 cm = 22 cm . area of each tile = ( 22 x 22 ) cm 2 . required number of tiles = 242 x 176 / ( 22 ^ 2 ) = 88 . answer : a"
Answer: a
Question (physics): rahul can do a work in 3 days while rajesh can do the same work in 2 days . both of them finish the work together and get $ 105 . what is the share of rahul ?
Options: a ) $ 50 , b ) $ 42 , c ) $ 60 , d ) $ 100 , e ) $ 90
Rationale: "rahul ' s wages : rajesh ' s wages = 1 / 3 : 1 / 2 = 2 : 3 rahul ' s share = 105 * 2 / 5 = $ 42 answer is b"
Answer: b
Question (general): a number , x is chosen at random from the set of positive integers less than 12 . what is the probability that ( 9 / x ) > x ?
Options: a ) 1 / 11 , b ) 2 / 9 , c ) 2 / 11 , d ) 2 / 3 , e ) 7 / 9
Rationale: "number x has to be chosen from numbers 1 - 11 ( 9 / x ) > x = > 9 > x ^ 2 = > x ^ 2 - 9 < 0 x can have 2 values only 1 , 2 therefore , probability = 2 / 11 answer c"
Answer: c
Question (general): 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 . 600 when the rate to profit rises from 5 to 7 percent . find the capital of b ?
Options: a ) 3999 , b ) 7799 , c ) 2500 , d ) 7500 , e ) 2912
Rationale: "a : b : c = 2 / 3 : 1 / 6 : 1 / 6 = 4 : 1 : 1 x * 2 / 100 * 2 / 3 = 600 b capital = 45000 * 1 / 6 = 7500 . answer : d"
Answer: d
Question (general): what least number must be subtracted from 427398 so that remaining number is divisible by 15
Options: a ) 3 , b ) 5 , c ) 7 , d ) 9 , e ) none of these
Rationale: "explanation : on dividing 427398 by 15 we get the remainder 3 , so 3 should be subtracted answer : option a"
Answer: a
Question (general): what is the value of 4 ^ 5 + 4 ^ 7 ?
Options: a ) 4 ^ 12 , b ) 4 ^ 35 , c ) 17 ( 4 ^ 5 ) , d ) 8 ^ 12 , e ) 7 ( 4 ^ 5 )
Rationale: "4 ^ 5 + 4 ^ 7 = 4 ^ 5 ( 1 + 4 ^ 2 ) = 4 ^ 5 * 17 answer c"
Answer: c
Question (gain): if 3 eighth of a number is 141 . what will be the approximately value of 32.08 % of this number ?
Options: a ) 119 , b ) 187 , c ) 181 , d ) 120 , e ) 891
Rationale: explanation : x * 3 / 8 = 141 = > x = 376 376 * 32.08 / 100 = 120 answer : d
Answer: d
Question (general): the number of positive integers valued pairs ( x , y ) ssatisfying 4 x - 17 y = 1 and x < = 1000 ( x is less than or equal to 1000 ) is
Options: a ) fifty nine , b ) 57 , c ) 55 , d ) 58 , e ) 60
Rationale: 4 x - 17 y = 1 y = ( 4 x - 1 ) / 17 x has to be a positive integer such that 1 < = x < = 1000 ( 4 x - 1 ) is a factor of 17 so that y is also a positive integer so we need to know how many numbers in the set { 37 , 1115 , . . . . , 3999 } are divisible by 17 lets try to observe the pattern 1 . 3 mod 17 = 3 2 . 7 mod 17 = 7 3 . 11 mod 17 = 11 4 . 15 mod 17 = 15 5 . 19 mod 17 = 2 6 . 23 mod 17 = 6 7 . 27 mod 17 = 10 8 . 31 mod 17 = 14 9 . 35 mod 17 = 1 10 . 39 mod 17 = 5 11 . 43 mod 17 = 9 12 . 47 mod 17 = 13 13.51 mod 17 = 0 14 . 55 mod 17 = 4 15 . 59 mod 17 = 8 16 . 63 mod 17 = 12 17 . 67 mod 17 = 16 . . . and after this the remainders will repeat ( this is no co - incidence that the cyclicity is also 17 ) so the right choices are x = 1313 + 1713 + 17 + 17 , . . . . . the number of such numbers is 59 ( highest one being 999 ) a
Answer: a
Question (physics): a can do a piece of work in 4 hours ; b and c together can do it in 2 hours , while a and c together can do it in 2 hours . how long will b alone take to do it ?
Options: a ) 12 , b ) 9 , c ) 8 , d ) 6 , e ) 4
Rationale: "a ' s 1 hour ' s work = 1 / 4 ; ( b + c ) ' s 1 hour ' s work = 1 / 2 ; ( a + c ) ' s 1 hour ' s work = 1 / 2 . ( a + b + c ) ' s 1 hour ' s work = ( 1 / 4 + 1 / 2 ) = 3 / 4 . b ' s 1 hour ' s work = ( 3 / 4 - 1 / 2 ) = 1 / 4 . therefore a alone will take 4 hours to do the work . e"
Answer: e
Question (gain): a person buys an article at rs . 500 . at what price should he sell the article so as to make a profit of 40 % ?
Options: a ) 700 , b ) 882 , c ) 772 , d ) 652 , e ) 271
Rationale: "cost price = rs . 500 profit = 40 % of 500 = rs . 200 selling price = cost price + profit = 500 + 200 = 700 answer : a"
Answer: a
Question (other): if both 5 ^ 2 and 3 ^ 3 are factors of n x ( 2 ^ 5 ) x ( 12 ^ 2 ) x ( 7 ^ 3 ) , what is the smallest possible positive value of n ?
Options: a ) 25 , b ) 75 , c ) 125 , d ) 150 , e ) 175
Rationale: "( 2 ^ 5 ) x ( 12 ^ 2 ) x ( 7 ^ 3 ) has two appearances of 3 ( in 12 ^ 2 ) and no appearances of 5 . thus n must include at least 3 * 5 ^ 2 = 75 the answer is b ."
Answer: b
Question (gain): find the compound interest on $ 56,000 at 20 % per annum for 9 months , compounded quarterly
Options: a ) 2532 , b ) 2552 , c ) 6524 , d ) 8827 , e ) 9512
Rationale: "principal = $ 56000 ; time = 9 months = 3 quarters ; rate = 20 % per annum = 5 % per quarter . amount = $ [ 56000 x ( 1 + ( 5 / 100 ) ) ^ 3 ] = $ 64827 . ci . = $ ( 64827 - 56000 ) = $ 8827 . answer d ."
Answer: d
Question (geometry): the radius of the two circular fields is in the ratio 5 : 4 the area of the first field is what percent greater than the area of the second ?
Options: a ) 22 % , b ) 32 % , c ) 34 % , d ) 64 % , e ) 36 %
Rationale: "r = 5 ï € r 2 = 25 r = 4 ï € r 2 = 16 25 ï € â € “ 9 ï € 100 - - - - ? = > 36 % . answer : d"
Answer: d
Question (physics): rahul can do a work in 3 days while rajesh can do the same work in 2 days . both of them finish the work together and get $ 250 . what is the share of rahul ?
Options: a ) $ 50 , b ) $ 40 , c ) $ 60 , d ) $ 100 , e ) $ 90
Rationale: rahul ' s wages : rajesh ' s wages = 1 / 3 : 1 / 2 = 2 : 3 rahul ' s share = 250 * 2 / 5 = $ 100 answer is d
Answer: d
Question (general): if n is a natural number , then ( 6 n 2 + 6 n ) is always divisible by ?
Options: a ) 6 only , b ) 6 and 12 both , c ) 12 only , d ) 6 or 12 only , e ) none
Rationale: "( 6 n 2 + 6 n ) = 6 n ( n + 1 ) , which is always divisible by 6 and 12 both , since n ( n + 1 ) is always even . b )"
Answer: b
Question (general): how many numbers from 10 to 46 are exactly divisible by 3 ?
Options: a ) 13 , b ) 12 , c ) 16 , d ) 17 , e ) 18
Rationale: "12 , 15 , 18 , 21 , 24 , 27 , 30 , 33 , 36 , 39 , 42 , 45 . 12 numbers . 10 / 3 = 3 and 46 / 3 = 15 = = > 15 - 3 = 12 . therefore 12 digits b )"
Answer: b
Question (general): what is the remainder when 54487 ^ ( 42787035 ) is divided by 5 ?
Options: a ) 0 , b ) 1 , c ) 2 , d ) 3 , e ) 4
Rationale: "we need to find the units digit of the number . the units digit of powers of seven repeats 7 , 9 , 3 , and 1 cyclically . since 42787035 has the form 4 a + 3 , the units digit is 3 . then the remainder when dividing by 5 is 3 . the answer is d ."
Answer: d
Question (general): the total number of digits used in numbering the pages of a book having 366 pages is
Options: a ) 732 , b ) 990 , c ) 1098 , d ) 1305 , e ) 1605
Rationale: "explanation : total number of digits = ( no . of digits in 1 - digit page nos . + no . of digits in 2 - digit page nos . + no . of digits in 3 - digit page nos . ) = ( 1 x 9 + 2 x 90 + 3 x 267 ) = ( 9 + 180 + 801 ) = 990 . answer : b"
Answer: b
Question (physics): the sum of three consecutive numbers is 252 . the greatest among these three number is :
Options: a ) 45 , b ) 80 , c ) 85 , d ) 55 , e ) 40
Rationale: "let the numbers be x , x + 1 and x + 2 then , x + ( x + 1 ) + ( x + 2 ) = 252 3 x = 252 x = 83 greatest number , ( x + 2 ) = 85 answer : c"
Answer: c
Question (physics): two friends decide to get together ; so they start riding bikes towards each other . they plan to meet halfway . each is riding at 6 mph . they live 36 miles apart . one of them has a pet carrier pigeon and it starts flying the instant the friends start traveling . the pigeon flies back and forth at 15 mph between the 2 friends until the friends meet . how many miles does the pigeon travel ?
Options: a ) 54 , b ) 66 , c ) 80 , d ) 45 , e ) 96
Rationale: "d 45 it takes 3 hours for the friends to meet ; so the pigeon flies for 3 hours at 18 mph = 45 miles"
Answer: d
Question (general): how many 3 - digit even numbers are possible such that if one of the digits is 4 , the next / succeeding digit to it should be 7 ?
Options: a ) 305 , b ) 5 , c ) 365 , d ) 405 , e ) 495
Rationale: 470 , 472 , 474 , 476 , and 478 , so total 5 . hence option b .
Answer: b
Question (gain): in a public show 45 % of the seats were filled . if there were 600 seats in the hall , how many seats were vacant ?
Options: a ) 330 , b ) 110 , c ) 120 , d ) 140 , e ) 150
Rationale: 75 % of 600 = 45 / 100 × 600 = 270 therefore , the number of vacant seats = 600 - 270 = 330 . answer : a
Answer: a
Question (general): if ( 1 / 5 ) ^ m * ( 1 / 4 ) ^ 2 = 1 / ( ( 10 ) ^ 4 ) , then m =
Options: a ) 4 , b ) 5 , c ) 6 , d ) 3 , e ) 2
Rationale: 1 / 5 ^ m * 1 / 4 ^ 2 = 1 / 2 ^ 4 * 5 ^ 4 2 ^ 4 * 5 ^ 4 / 2 ^ 4 = 5 ^ m or 5 ^ 4 = 5 ^ m therefore m = 4 a
Answer: a
Question (physics): two workers completed the painting of a building in 10 days . if they were to paint the building separately , how many days will it take each worker , if one of them can complete it in approximately 2 days earlier than the other .
Options: a ) 9 and 11 , b ) 19 and 21 , c ) 8 and 10 , d ) 10 and 15 , e ) 10 and 12
Rationale: work = ( a ) ( b ) / ( a + b ) where a and b are the individual times of each entity . here , we ' re told that ( working together ) the two workers would complete a job in 10 days . this means that ( individually ) each of them would take more than 10 days to do the job . answers e , a and c are illogical , since the individual times must both be greater than 10 days . so we can test the values for answers b and d . using the values for answers b and d . . . answer b : ( 19 ) ( 21 ) / ( 19 + 21 ) = 399 / 40 = 9.97 this is a match ( complete it in approximately 2 days earlier than the other ) this is a match final answer : b
Answer: b
Question (general): frank is 15 years younger then john . in 3 years john will be twice as old as frank . how old will frank be in 4 years ?
Options: a ) 8 , b ) 10 , c ) 12 , d ) 14 , e ) 16
Rationale: frank is 15 years younger then john - - > f + 15 = j ; in 5 years john will be twice as old as frank ( in 3 year john will be j + 3 years old and frank will be f + 3 years old ) - - > j + 3 = 2 * ( f + 3 ) - - > ( f + 15 ) + 3 = 2 * ( f + 3 ) - - > f = 12 ; in 4 years frank will be 12 + 4 = 16 years old . answer : e .
Answer: e
Question (general): last year , for every 100 million vehicles that traveled on a certain highway , 50 vehicles were involved in accidents . if 5 billion vehicles traveled on the highway last year , how many of those vehicles were involved in accidents ? ( 1 billion = 1,000 , 000,000 )
Options: a ) 800 , b ) 850 , c ) 900 , d ) 500 , e ) 1000
Rationale: "to solve we will set up a proportion . we know that “ 100 million vehicles is to 50 accidents as 5 billion vehicles is to x accidents ” . to express everything in terms of “ millions ” , we can use 5,000 million rather than 5 billion . creating a proportion we have : 100 / 50 = 5,000 / x cross multiplying gives us : 100 x = 2,000 * 50 x = 20 * 50 = 1000 answer : e"
Answer: e
Question (physics): a man sitting in a train which is traveling at 30 kmph observes that a goods train , traveling in opposite direction , takes 9 seconds to pass him . if the goods train is 280 m long , find its speed . ?
Options: a ) 50 kmph , b ) 82 kmph , c ) 62 kmph , d ) 65 kmph , e ) 75 kmph
Rationale: "relative speed = 280 / 9 m / sec = ( ( 280 / 9 ) * ( 18 / 5 ) ) kmph = 112 kmph . speed of goods train = ( 112 - 30 ) kmph = 82 kmph . answer : b ."
Answer: b
Question (general): in a certain school , 20 % of students are below 8 years of age . the number of students above 8 years of age is 2 / 3 of the number of students of 8 years of age which is 72 . what is the total number of students in the school ?
Options: a ) 72 , b ) 80 , c ) 120 , d ) 40 , e ) 150
Rationale: "explanation : let the number of students be x . then , number of students above 8 years of age = ( 100 - 20 ) % of x = 80 % of x . 80 % of x = 72 + 2 / 3 of 72 80 / 100 x = 120 x = 150 . answer : option e"
Answer: e
Question (general): if 4 x + 3 y = 8 and y - 3 x = 8 , then what is the value of x + 4 y ?
Options: a ) 1 / 7 , b ) 16 , c ) 15 , d ) 52 / 7 , e ) 60 / 7
Rationale: "4 x + 3 y = 8 . . . equation 1 - 3 x + y = 8 . . . equation 2 adding both the equations x + 4 y = 16 correct answer option b"
Answer: b
Question (gain): mike needs 30 % to pass . if he scored 212 marks and falls short by 28 marks , what was the maximum marks he could have got ?
Options: a ) 343 , b ) 677 , c ) 800 , d ) 867 , e ) 932
Rationale: "if mike had scored 28 marks more , he could have scored 30 % therefore , mike required 212 + 28 = 240 marks let the maximum marks be m . then 30 % of m = 240 ( 30 / 100 ) × m = 240 m = ( 240 × 100 ) / 30 m = 24000 / 30 m = 800 answer : c"
Answer: c
Question (physics): a man can ride on motorcycle at 50 kmph upward road and 100 kmph downward road . he takes 12 hours to ride motorcycle uphill from lower point a to upper point b and back to a . what is the total distance traveled by him in 12 hours ? he must return back to base point a in remaining time .
Options: a ) 1000 , b ) 900 , c ) 800 , d ) 400 , e ) 1200
Rationale: upward distance traveled per hour - 50 km , distance traveled after 8 hours = 400 km . he remained with 4 hours travel downward , i . e . distance traveled in remaining 4 hours downward = 400 km so total distance traveled from a to b and back to point a = 400 km upward + 400 km downhill = 800 km ( answer : c )
Answer: c
Question (other): 7 machines at a certain factory operate at the same constant rate . if 6 of these machines , operating simultaneously , take 42 hours to fill a certain production order , how many fewer hours does it take all 7 machines , operating simultaneously , to fill the same production order ?
Options: a ) 3 , b ) 4 , c ) 5 , d ) 6 , e ) 7
Rationale: the total work is 6 * 42 = 252 machine hours the time required for seven machines is 252 / 7 = 36 hours , thus 6 fewer hours . the answer is d .
Answer: d
Question (general): what number is obtained by adding the units digits of 734 ^ 99 and 347 ^ 83 ?
Options: a ) 7 , b ) 8 , c ) 9 , d ) 10 , e ) 11
Rationale: the units digit of 734 ^ 99 is 4 because 4 raised to the power of an odd integer ends in 4 . the units digit of 347 ^ 83 is 3 because powers of 7 end in 7 , 9 , 3 , or 1 cyclically . since 83 is in the form 4 n + 3 , the units digit is 3 . then 4 + 3 = 7 . the answer is a .
Answer: a
Question (gain): the amount of principal rs . 8000 at compound interest at the ratio of 5 % p . a . for 1 year is
Options: a ) s . 9621 , b ) s . 6921 , c ) s . 8400 , d ) s . 6261 , e ) s . 6361
Rationale: "c . i = p ( 1 + r / 100 ) ^ n = 8000 ( 1 + 5 / 100 ) = rs 8400 answer : c"
Answer: c
Question (general): the visitors of a modern art museum who watched a certain picasso painting were asked to fill in a short questionnaire indicating whether they had enjoyed looking at the picture and whether they felt they had understood it . according to the results of the survey , all 150 visitors who did not enjoy the painting also did not feel they had understood the painting , and the number of visitors who enjoyed the painting was equal to the number of visitors who felt they had understood the painting . if 3 / 4 of the visitors who answered the questionnaire both enjoyed the painting and felt they had understood the painting , then how many visitors answered the questionnaire ?
Options: a ) 90 , b ) 120 , c ) 160 , d ) 360 , e ) 600
Rationale: "if we exclude those cases and take the question at face value , then it seems straightforward . group # 1 = ( did n ' t like , did n ' t understand ) = 150 group # 2 = ( likeunderstood ) = 3 / 4 ( 1 / 4 ) n = 150 n = 600 answer = ( e )"
Answer: e
Question (general): if x = 4 ^ 16 and x ^ x = 4 ^ k , what is k ?
Options: a ) 4 ^ 14 , b ) 4 ^ 16 , c ) 4 ^ 18 , d ) 4 ^ 20 , e ) 4 ^ 22
Rationale: "solution : we know that x = 4 ^ 16 which implies x ^ x = ( 4 ^ 16 ) ^ ( 4 ^ 16 ) = 4 ^ ( 16 * 4 ^ 16 ) [ because ( x ^ y ) ^ z = x ^ ( y * z ) ) ] so 4 ^ ( 4 ^ 2 * 4 ^ 16 ) = 4 ^ ( 4 ^ ( 2 + 16 ) ) [ because x ^ a * x ^ b = x ^ ( a + b ) ] therefore x ^ x = 4 ^ ( 4 ^ 18 ) given that x ^ x = 4 ^ k so 4 ^ ( 4 ^ 18 ) = 4 ^ k since the base is same the exponent will also be same therefore k = 4 ^ 18 answer : c"
Answer: c
Question (general): what is the remainder when 123456789101112131415161718192021222324252627282930313233343536373839404142434481 is divided by 45 ?
Options: a ) 26 , b ) 36 , c ) 16 , d ) 06 , e ) 40
Rationale: explanation : let ' s call : a = 123456789101112131415161718192021222324252627282930313233343536373839404142434481 = > a = b * 100 + 81 [ with b = 1234567 . . . . . 424344 ] we have : b x 100 is divisible by 45 because : - sum of all digits in b = 1 + 2 + 3 + . . . . + 44 = ( 1 + 44 ) + ( 2 + 43 ) + . . . . + ( 22 + 23 ) ( 22 pairs ) = 22 * 45 = > b divisible for 9 since b is divisible by 9 , b * 100 will be divisible by 9 * 5 = 45 81 divided 45 gives a remainder of 36 therefore , a divided by 45 reminder 36 answer : b
Answer: b
Question (physics): a man can row 5 kmph in still water . when the river is running at 1.2 kmph , it takes him 1 hour to row to a place and black . how far is the place ?
Options: a ) 2.25 , b ) 2.35 , c ) 2.45 , d ) 2.55 , e ) 2.65
Rationale: "m = 5 s = 1.2 ds = 5 + 1.2 = 6.2 us = 5 - 1.2 = 3.8 x / 6.2 + x / 3.8 = 1 x = 2.35 . answer : b"
Answer: b
Question (physics): a taxi company charges $ 1.15 for the first quarter of a mile and fifteen cents for each additional quarter of a mile . what is the maximum distance someone could travel with $ 4.90 ?
Options: a ) 4 miles , b ) 4 1 / 4 miles , c ) 4 3 / 4 miles , d ) 5 1 / 2 miles , e ) 6 1 / 2 miles
Rationale: if we start out with $ 4.90 and have to spend $ 1.15 for the first quarter - mile , we will have $ 3.75 left to spend on quarter - mile intervals . since $ 3.75 / $ 0.15 = 25 , we can buy 25 more quarter - miles , and will travel 26 quarter miles in all : 26 × 1 / 4 = 6 1 / 2 miles . the correct answer is choice ( e ) .
Answer: e
Question (general): in a race where 10 cars are running , the chance that car x will win is 1 / 7 , that y will win is 1 / 3 and that z will win is 1 / 5 . assuming that a dead heat is impossible , find the chance that one of them will win .
Options: a ) 1 / 140 , b ) 1 / 180 , c ) 71 / 105 , d ) 21 / 113 , e ) 57 / 120
Rationale: "required probability = p ( x ) + p ( y ) + p ( z ) ( all the events are mutually exclusive ) . = 1 / 7 + 1 / 3 + 1 / 5 = 71 / 105 answer : c"
Answer: c
Question (general): a person decided to build a house in 100 days . he employed 100 men in the beginning and 100 more after 20 days and completed the construction in stipulated time . if he had not employed the additional men , how many days behind schedule would it have been finished ?
Options: a ) 40 , b ) 80 , c ) 70 , d ) 60 , e ) 50
Rationale: "200 men do the rest of the work in 100 - 20 = 80 days 100 men can do the rest of the work in 80 * 200 / 100 = 160 days required number of days = 160 - 80 = 80 days answer is b"
Answer: b
Question (physics): find the cost of fencing around a circular field of diameter 32 m at the rate of rs . 1.50 a meter ?
Options: a ) 287 , b ) 132 , c ) 150.9 , d ) 158 , e ) 267
Rationale: "2 * 22 / 7 * 16 = 100.6 100.6 * 1 1 / 2 = rs . 150.9 answer : c"
Answer: c
Question (physics): bob wants to run a mile in the same time as his sister . if bob ’ s time for a mile is currently 10 minutes 40 seconds and his sister ’ s time is currently 5 minutes 20 seconds , by what percent does bob need to improve his time in order run a mile in the same time as his sister ?
Options: a ) 3 % , b ) 50 % , c ) 8 % , d ) 10 % , e ) 12 %
Rationale: "bob ' s time = 640 secs . his sis ' time = 320 secs . percent increase needed = ( 640 - 320 / 640 ) * 100 = 320 / 640 * 100 = 50 % . ans ( b ) ."
Answer: b
Question (general): how much time does a train 100 metres long running at 72 km / hr take to pass a pole ?
Options: a ) 7.9 s , b ) 2.5 s , c ) 5 s , d ) 7.6 s , e ) 7.4 s
Rationale: explanation : 72 km / hr = 72 * 5 / 18 = 20 m / s speed = distance / time ; v = d / t 20 = 100 / t t = 5 s answer : c
Answer: c
Question (gain): sahil purchased a machine at rs 12000 , then got it repaired at rs 5000 , then gave its transportation charges rs 1000 . then he sold it with 50 % of profit . at what price he actually sold it .
Options: a ) rs . 22000 , b ) rs . 24000 , c ) rs . 26000 , d ) rs . 27000 , e ) none of these
Rationale: "explanation : question seems a bit tricky , but it is very simple . just calculate all cost price , then get 150 % of cp . c . p . = 12000 + 5000 + 1000 = 18000 150 % of 18000 = 150 / 100 * 18000 = 27000 option d"
Answer: d
Question (gain): find the simple interest on rs . 450 for 8 months at 5 paisa per month ?
Options: a ) 277 , b ) 270 , c ) 180 , d ) 266 , e ) 121
Rationale: "i = ( 450 * 8 * 5 ) / 100 = 180 answer : c"
Answer: c
Question (general): in a division sum , the remainder is 0 . as student mistook the divisor by 12 instead of 21 and obtained 49 as quotient . what is the correct quotient ?
Options: a ) 0 , b ) 12 , c ) 13 , d ) 20 , e ) 28
Rationale: "12 * 49 = 588 588 % 21 = 28 answer : e"
Answer: e
Question (general): 54671 - 18456 - 33466 = ?
Options: a ) 2749 , b ) 5449 , c ) 6749 , d ) 6449 , e ) 6468
Rationale: "a if we calculate we will get 2749"
Answer: a
Question (other): uba capital recently bought brand new vehicles for office use . uba capital only went for toyota and honda and bought more of toyota than honda at the ratio of 4 : 6 . if 40 % of the toyota bought and 60 % of the honda bought were suv ã ¢ â ‚ ¬ â „ ¢ s . how many suv ã ¢ â ‚ ¬ â „ ¢ s did uba capital buy in the aforementioned purchase ?
Options: a ) 66 % , b ) 64 % , c ) 68 % , d ) 69 % , e ) 52 %
Rationale: "let total no of vehicles bought be 100 , toyota 40 and honda 60 , so total number of suv ' s bought for toyota and honda respectively 40 * 40 / 100 = 16 and 60 * 60 / 100 = 36 so total 52 suv ' s were bought out of 100 vehicles bought . . so required % is 52 % answer : e"
Answer: e
Question (gain): the effective annual rate of interest corresponding to a nominal rate of 12 % per annum payable half - yearly is ?
Options: a ) 16.06 % , b ) 16.07 % , c ) 12.36 % , d ) 6.09 % , e ) 6.19 %
Rationale: "amount of rs . 100 for 1 year when compounded half - yearly = [ 100 * ( 1 + 6 / 100 ) 2 ] = rs . 112.36 effective rate = ( 112.36 - 100 ) = 12.36 % answer : c"
Answer: c
Question (gain): an association of mathematics teachers has 1600 members . only 525 of these members cast votes in the election for president of the association . what percent of the total membership voted for the winning candidate if the winning candidate received 60 percent of the votes cast ?
Options: a ) 75 % , b ) 58 % , c ) 42 % , d ) 14.5 % , e ) 19.6 %
Rationale: total umber of members = 1600 number of members that cast votes = 525 since , winning candidate received 60 percent of the votes cast number of votes for winning candidate = ( 60 / 100 ) * 525 = 315 percent of total membership that voted for winning candidate = ( 315 / 1600 ) * 100 = 19.6 % answer e
Answer: e