mathewhe/aqua_rat huggingface dataset:
Question: Two trains are running at 40 km/hr and 20 km/hr respectively in the same direction. Fast train completely passes a man sitting in the slower train in 5 sec. What is the length of the fast train?
(A) 27 7/5
(B) 27 7/3
(C) 27 7/2
(D) 27 7/9
(E) 27 7/4
Rationale: Relative speed = (40 - 20) = 20 km/hr.
= 20 * 5/ 18 = 50/9 m/sec.
Length of faster train = 50/9 * 5 = 250/9
= 27 7/9 m.
Answer: D
Answer: (D) 27 7/9
Question: A train travelling at a speed of 75 mph enters a tunnel 31/2 miles long. The train is 1/4 mile long. How long does it take for the train to pass through the tunnel from the moment the front enters to the moment the rear emerges?
(A) 2.5 min
(B) 3 min
(C) 3.2 min
(D) 3.5 min
(E) 4 min
Rationale: Total distance = (7/2 + 1/4) miles
= 15/4 miles
time taken = 15/4*75 hrs
=1/20 hrs = 3 min
ANSWER B
Answer: (B) 3 min
Question: A merchant marks his goods up in such a way that the profit made on selling 30 articles is equal to the cost price of 20 articles. What is the E % profit made by the merchant?
(A) 66.67 %
(B) 50 %
(C) 200 %
(D) 100 %
(E) 33.33 %
Rationale: C.P of 1 article= $30(say)
C.P of 20 articles=30*20=$600
Now, C.P of 20 articles=Profit on 30 articles
Therefore, profit on 1 article=$600/30=$20
Profit E%=(20/30)*100=66.67%
Answer A
Answer: (A) 66.67 %
Question: In an exam Ashley secured 332 marks. If she secured 83 % makes, find the maximum marks
(A) 133
(B) 376
(C) 377
(D) 400
(E) 377
Rationale: Let the maximum marks be m.
Ashley’s marks = 83% of m
Ashley secured 332 marks
Therefore, 83% of m = 332
⇒ 83/100 × m = 332
⇒ m = (332 × 100)/83
⇒ m =33200/83
⇒ m = 400
Therefore, Ashley got 332 marks out of 400 marks.
Answer:D
Answer: (D) 400
Question: If Aaron is now twice as old as Bailey was 20 years ago, and B is Bailey's current age in years, which of the following represents the sum of Aaron and Bailey's ages 10 years from now?
(A) 3B-25
(B) 3B-16
(C) 3B-45
(D) 3B-78
(E) 3B-20
Rationale: B is Bailey's current age.
Let Aaron's current age be A.
given A = 2(B-20).
four years from now Aaron's age will be = 2(B-20) + 10 = 2B-30
four years from now Bailey's age will be = B+10
Sum of ages of Mason and Gunther's after 4 years = 2B-30+B+10= 3B-20
Ans : E
Answer: (E) 3B-20
Question: How many seconds will a 900 m long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train if the speed of the train is 63 km/hr?
(A) 23 sec
(B) 30 sec
(C) 49 sec
(D) 54 sec
(E) 59 sec
Rationale: Speed of train relative to man = 63 - 3
= 60 km/hr.
= 60 * 5/18
= 50/3 m/sec.
Time taken to pass the man = 900 * 3/50
= 54 sec.
Answer:D
Answer: (D) 54 sec
Question: The length of a train and that of a platform are equal. If with a speed of 90 k/hr, the train crosses the platform in one minute, then the length of the train (in meters) is?
(A) 238
(B) 3769
(C) 750
(D) 789
(E) 231
Rationale: Speed = [90 * 5/18] m/sec = 25 m/sec; Time = 1 min. = 60 sec.
Let the length of the train and that of the platform be x meters.
Then, 2x/60 = 25 è x = 25 * 60 / 2 = 750
Answer: D
Answer: (D) 789
Question: If the arithmetic mean of seventy five numbers is calculated, it is 35. If each number is increased by 5, then mean of new numbers is
(A) 30
(B) 35
(C) 40
(D) 50
(E) None
Rationale: Sol.
A.M. of 75 numbers = 35.
Sum of 75 numbers = (75 x 35) = 2625.
Total increase = (75x5) = 375.
Increased sum = (2625 + 375) = 3000.
Increased average = 3000 / 75 = 40.
Answer C
Answer: (C) 40
Question: Some of the 50% solution of acid was removed and this was replaced with an equal amount of 30% solution of acid. As a result, a 40% solution of acid was obtained. What fraction of the original solution was replaced?
(A) 1/2
(B) 1/3
(C) 2/3
(D) 1/4
(E) 2/5
Rationale: Let x be the fraction of the original solution that was replaced.
0.5*(1-x)+0.3(x)=0.4
0.2x=0.1
x=1/2
The answer is A.
Answer: (A) 1/2
Question: In how many ways can 4 apples (identical) be distributed among 3 children? (Some children may get no apples.)
(A) 20
(B) 25
(C) 30
(D) 15
(E) 10
Rationale: Generalised form for n = number of identical objects, and r = number of children is n+r-1Cr-1.
n=4 r= 3
6C2 =15
Answer : D
Answer: (D) 15
Question: A factory produces 7500 toys per week. If the workers at this factory work 5 days a week and if these workers make the same number of toys everyday, how many toys are produced each day?
(A) 4436 toys
(B) 5487 toys
(C) 6113 toys
(D) 1875 toys
(E) 1375 toys
Rationale: To find the number of toys produced every day, we divide the total number of toys produced in one week (of 5 days) by 5.
7500 /4 = 1875 toys
correct answer D
Answer: (D) 1875 toys
Question: A student has to secure 30% marks to get through. If he gets 80 marks and fails by 70 marks, find the maximum marks set for the examination.
(A) 500
(B) 1000
(C) 1200
(D) 1500
(E) none of these
Rationale: Here, x = 30 , y = 80 and z = 70
Therefore, Maximum marks = [100( y + z )] / x.
= [100( 80 + 70 )]/30
= 500.
ANSWER:A
Answer: (A) 500
Question: Prints a page 24 pg per min .If the printed for 4 hours except 10 min.Where there
was an paper jam,how many page did it print
(A) 10,880
(B) 12,880
(C) 14,880
(D) 8,880
(E) 5,520
Rationale: 24 pages ------->1 min
4 hrs except 10 mints means=4*60=240-10=230 mints
i.e.,230*24=5,520 pages printed.
ANSWER:E
Answer: (E) 5,520
Question: Four milkmen rented a pasture. A grazed 24 cows for 3 months; B 10 for 5 months; C 35 cows for 4 months and D 21 cows for 3 months. If A's share of rent is Rs. 720, find the total rent of the field.
(A) 3750
(B) 3550
(C) 4250
(D) 2250
(E) 3250
Rationale: Ratio of shares of A, B, C, D = (24 x 3) : (10 x 5) : (35 x 4) : (21 x 3) = 72 : 50 : 140 : 63.
Let total rent be Rs. x. Then, A’s share = Rs. (72x)/325
(72x)/325=720 = x=(720 x 325)/72 = 3250
Hence, total rent of the field is Rs. 3250.
Answer is E.
Answer: (E) 3250
Question: In a certain village, 20 litres of water are required per household per month. At this rate, if there are 10 households in the village, how long (in months) will 2000 litres of water last?
(A) 5
(B) 2
(C) 10
(D) 1
(E) 12
Rationale: I find it much easier to understand with real numbers, so choose (almost) any numbers to replace m,n and p:
In a certain village,m 20 litres of water are required per household per month. At this rate, if there aren 10 households in the village, how long (in months) willp2000litres of water last?
Water required is 20*10=200 (m*n)
Water available is 2000 (p)
It will last 10 months (p/m*n)
Ans : C
Answer: (C) 10
Question: In how many ways a committee, consisting of 4 men and 2 women can be formed from 6men and 4 women?
(A) 120
(B) 60
(C) 90
(D) 150
(E) 35
Rationale: Required number of ways = 6C4 * 4C2
= (6*5/2*1)*(4*3/2*1)
= 90
Answer is C
Answer: (C) 90
Question: Two employees X and Y are paid a total of Rs. 550 per week by their employer. If X is paid 120 percent of the sum paid to Y, how much is Y paid per week?
(A) Rs.250
(B) Rs.300
(C) Rs.350
(D) Rs.400
(E) Rs.450
Rationale: Let the amount paid to X per week = x
and the amount paid to Y per week = y
Then x + y = 550
But x = 120% of y = 120y/100 = 12y/10
∴12y/10 + y = 550
⇒ y[12/10 + 1] = 550
⇒ 22y/10 = 550
⇒ 22y = 5500
⇒ y = 5500/22 = 500/2 = Rs.250
A)
Answer: (A) Rs.250
Question: Find the product of the local value and absolute value of 4 in 20468?
(A) 1000
(B) 1200
(C) 1340
(D) 1450
(E) 1600
Rationale: Local value of 4 = 4 x 100 = 400
Place value of 4 = 4
There fore = 4 x 400 = 1600
E
Answer: (E) 1600
Question: Linda spent 3/4 of her savings on furniture and the rest on a TV. If the TV cost her $250, what were her original savings?
(A) $900
(B) $800
(C) $1000
(D) $700
(E) $100
Rationale: If Linda spent 3/4 of her savings on furnitute, the rest
4 / 4 - 3 / 4 = 1 / 4 on a TV
But the TV cost her $250. So 1 / 4 of her savings is $250. So her original savings are 4 times $250 = $100
correct answer E
Answer: (E) $100
Question: John decides to attend a basketball game with six friends. If the party of seven sits together in seven consecutive seats, and John must NOT sit in between two of his friends, how many ways can the seven friends be arranged?
(A) 1220
(B) 1000
(C) 540
(D) 1440
(E) 720
Rationale: John have to sit at either of the ends.
If John sits on the left most corner, then other 6 friends can be arranged in 6! = 720
John can also sit on the other end, then another 6! ways we can arrange.
So total number of ways = 720+720 = 1440
Answer : D
Answer: (D) 1440
Question: Find the smallest number which when divided by 12 and 15 leaves respective remainders of 8 and 11.
(A) 87
(B) 97
(C) 27
(D) 21
(E) 56
Rationale: Let 'N' is the smallest number which divided by 12 and 15 leaves respective remainders of 8 and 11.
Required number = (LCM of 12 and 15) - (common difference of divisors and remainders) = (60) - (4) = 56.
ANSWER:E
Answer: (E) 56
Question: In how many ways can the letters of the word 'APPLE' be arranged ?
(A) 90
(B) 180
(C) 120
(D) 60
(E) 720
Rationale: The word 'APPLE' contains 5 letters, 1A, 2P, 1L.and 1E.
∴ Required number of ways = 5!/(1!)(2!)(1!)(1!) = 60.
Answer is D
Answer: (D) 60
Question: In the faculty of Reverse-Engineering, 230 second year students study numeric methods, 423 second year students study automatic control of airborne vehicles and 134 second year students study them both. How many students are there in the faculty if the second year students are approximately 80% of the total?
(A) 515.
(B) 545.
(C) 618.
(D) 649.
(E) 666.
Rationale: Answer is D :649
Solution : Total number of students studying both are 423 + 230 - 134 = 519 (Subtracting the 134 since they were included in the both the other numbers already).
So 80% of total is 519, so 100% is approx. 649.
Answer: (D) 649.
Question: If the selling price of a mat is five times the discount offered and if the percentage of discount is equal to the percentage profit, find the ratio of the discount offered to the cost price.
(A) 11: 30
(B) 1 : 5
(C) 1 : 6
(D) 7 : 30
(E) 8 : 30
Rationale: Since S.P. = 5 (M.P. - S.P.) => 5 M.P. = 6 S.P.
M.P. = (6/5) S.P.
Since the percentage discount = Percentage profit,
[ { (6/5) S.P. - S.P. } / ((6/5 ) S.P) ] x100 = (S.P - C.P) / C.P x 100
Therefore, 1/6 = (S.P/C.P) – 1 => S.P = (7/6) C.P
M.P = 6/5 S.P = 6/5 x 7/6 C.P = 7/5 C.P
Therefore, Ratio of discount to C.P
= (M.P – S.P)/C.P = [{(7/5)C.P - (7/6)C.P} / C.P.]
= 7/30
Therefore the ratio is 7 : 30
ANSWER:D
Answer: (D) 7 : 30
Question: If 9 men do a work in 80 days, in how many days will 20 men do it?
(A) 18 days
(B) 36 days
(C) 42 days
(D) 48 days
(E) 44 days
Rationale: 9 * 80 = 20 * x
x = 36 days
ANSWER:B
Answer: (B) 36 days
Question: A tyre has two punctures. The first puncture along would have made the tyre flat in 9 minutes and the second alone would have done it in 6 minutes. If air leaks out at a constant rate, how long does it take both the punctures together to make it flat?
(A) 1 1⁄2 minutes
(B) 3 1⁄2 minutes
(C) 3 3⁄5 minutes
(D) 4 1⁄4 minutes
(E) None of these
Rationale: 1 minute’s work of both the punctures = (1⁄9 + 1⁄6) = 5⁄18
So, both the punctures will make the tyre flat in 18⁄5 = 33⁄5 min.
Answer C
Answer: (C) 3 3⁄5 minutes
Question: A man can row downstream at 18 kmph and upstream at 10 kmph. Find the speed of the man in still water and the speed of stream respectively?
(A) 6
(B) 8
(C) 3
(D) 4
(E) 5
Rationale: Let the speed of the man in still water and speed of stream be x kmph and y kmph respectively.
Given x + y = 18 --- (1)
and x - y = 10 --- (2)
From (1) & (2) 2x = 28 => x = 14, y = 4.
Answer:D
Answer: (D) 4
Question: A train which has 440 m long, is running 45 kmph. In what time will it cross a person moving at 9 kmph in same direction ?
(A) 56 sec
(B) 44 sec
(C) 36 sec
(D) 29 sec.
(E) 19 sec.
Rationale: Time taken to cross a moving person = length of train/ relative speed
Time taken = 440/((45-9) (5/18)
= 440/ 36*(5/18)
= 440/10
= 44 sec
ANSWER:B
Answer: (B) 44 sec
Question: If, 2 years ago, Jamie was half as old as he is now, how old will he be in x years?
(A) x + 10
(B) x + 5
(C) x + 2
(D) x – 5
(E) x + 4
Rationale: let his age be a. a-2=a/2 hence a=4. 4 years hence, a =x+4
Answer E
Answer: (E) x + 4
Question: Find the curved surface area, if the radius of a cone is 35 m and slant height is 30 m?
(A) 1100
(B) 2200
(C) 3300
(D) 4400
(E) 5500
Rationale: Cone curved surface area = Ï€rl
22/7 Ã— 35 Ã— 30 = 110 Ã— 30 = 3300 m(power2)
Answer is C.
Answer: (C) 3300
Question: The difference between C.I. and S.I. on an amount of $10,000 for 2 years is $36. What is the rate of interest per annum?
(A) 5%
(B) 6%
(C) 7%
(D) 8%
(E) 9%
Rationale: $36 is the interest on the first year of interest.
Let x be the interest rate.
The interest after the first year is 10000*x.
The interest on the first year's interest is 10000*x*x
10000*x^2 = 36
x = 0.06
The answer is B.
Answer: (B) 6%
Question: Speed of a boat in standing water is 9 kmph and the speed of the stream is 1. 5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is
(A) 16 hours
(B) 18 hours
(C) 20 hours
(D) 24 hours
(E) 28 hours
Rationale: upstream = 9kmph-1.5kmph = 7.5kmph
Downstream = 9kmph+1.5kmph = 10.5kmph
total time taken = 105/7.5 + 105/10.5 =24 hrs
ANSWER:D
Answer: (D) 24 hours
Question: On a certain road 14% of the motorists exceed the posted speed limit and receive speeding tickets, but 20% of the motorists who exceed the posted speed limit do not receive speeding tickets. What percent of the motorists on the road exceed the posted speed limit?
(A) 10.5%
(B) 12.5%
(C) 17.5%
(D) 22%
(E) 30%
Rationale: Answer is C.
This question is in the OG and thus well explained by ets.
those who exceed : X
so X = 14%+0,2X
id est X = 17,5%
Answer: (C) 17.5%
Question: Rs.1200 divided among P, Q and R. P gets half of the total amount received by Q and R. Q gets one-third of the total amount received by P and R. Find the amount received by R?
(A) 767
(B) 500
(C) 287
(D) 111
(E) 172
Rationale: Explanation:
Let the amounts to be received by P, Q and R be p, q and r.
p + q + r = 1200
p = 1/2 (q + r) => 2p = q + r
Adding 'p' both sides, 3p = p + q + r = 1200
=> p = Rs.400
q = 1/3 (p + r) => 3q = p + r
Adding 'q' both sides, 4q = p + q + r = 1200
=> q = Rs.300
r = 1200 - (p + q) => r = Rs.500.
Answer: B
Answer: (B) 500
Question: If 8 men or 12 women can do a piece of work in 25 days, in how many days can the same work be done by 6 men and 11 women?
(A) 10 days
(B) 11 days
(C) 13 days
(D) 15 days
(E) 17 days
Rationale: 8men = 12women (i.e 2men = 3women)
12women 1 day work= 1/25
soln:
6men(9women)+ 11women=20women=?
1 women 1 day work =12*25= 1/300
so, 20 women work= 20/300=1/15
ans: 15 days
ANSWER:D
Answer: (D) 15 days
Question: A motor boat takes 12 hours to go downstream and it takes 24 hours to return the same distance. what is the time taken by boat in still water?
(A) 26 h
(B) 16 h
(C) 86 h
(D) 96 h
(E) 66 h
Rationale: Explanation:
If t1 and t2 are the upstream and down stream times. Then time taken in still water is given by
\inline \frac{2\times t1\times t2}{t1+t2}=\frac{2\times 12\times 24}{36}=16h
Answer: B
Answer: (B) 16 h
Question: A man buys Rs. 20 shares paying 9% dividend. The man wants to have an interest of 12% on his money. The market value of each share is?
(A) 14
(B) 15
(C) 61
(D) 17
(E) 18
Rationale: Dividend on Rs. 20 = Rs. (9/100)x 20 = Rs.9/5.
Rs. 12 is an income on Rs. 100.
Rs.9/5 is an income on Rs.[ (100/12) x (9/5)] = Rs. 15?
Answer: B
Answer: (B) 15
Question: A and B invest money in the ratio 2:3 and they has loss of Rs.7000 at the end of year. what is the share of loss of B?
(A) Rs.4200
(B) Rs.3200
(C) Rs.1200
(D) Rs.200
(E) None of the above
Rationale: et ratio of A and B be 2x & 3x
so net loss = 2x+3x= 7000
x=1400
A=2x=2(1400)=2800
B= 3x=3(1400)=4200
so, B= 4200
ANSWER:A
Answer: (A) Rs.4200
Question: A bullet train leaves Kyoto for Tokyo traveling 240 miles per hour at 12 noon. Ten minutes later, a train leaves Tokyo for Kyoto traveling 160 miles per hour. If Tokyo and Kyoto are 340 miles apart, at what time will the trains pass each other?
(A) 12:40pm
(B) 12:49pm
(C) 12:55pm
(D) 1:00pm
(E) 1:05pm
Rationale: Train A: going from K to T
Train B: going from T to K
First I calculated how far Train A will have travelled by the time Train B starts at 12:10:
10 minutes at 240 mph
1/6*240=40miles
They have 340-40=300 miles to travel to meet each other.
I found the combined rate of the two trains
Rate(A) + Rate(B) = 400mph
Divide Distance/Rate to find total time each will travel:
300/400>>> 45 Minutes to meet
12:10+45 minutes = 12:55 or Answer C
Answer: (C) 12:55pm
Question: A chemist mixes one liter of pure water with x liters of a 30% salt solution, and the resulting mixture is a 15% salt solution. What is the value of x?
(A) 1/4
(B) 1/3
(C) 1/2
(D) 1
(E) 3
Rationale: Concentration of salt in pure solution = 0
Concentration of salt in salt solution = 30%
Concentration of salt in the mixed solution = 15%
The pure solution and the salt solution is mixed in the ratio of --> (30 - 15)/(15 - 0) = 1/1
1/x = 1/1
x = 1
Answer: D
Answer: (D) 1
Question: In five football games thus far this season, Barry has run for 98, 107, 85, 89, and 91 yards. At a minimum, how many yards N will he need to gain this Sunday if he wants to keep his season average above 100 yards?
(A) 101
(B) 116
(C) 130
(D) N=131
(E) N=141
Rationale: Sorry the answer N=131 is D.
Answer: (D) N=131
Question: The probability of obtaining an even prime number on each die, when a pair of dice is rolled out?
(A) 2/13
(B) 1/15
(C) 1/36
(D) 1/25
(E) 1/27
Rationale: The probability of getting an even prime (2) for a pair of dice is only once.
That is 1 on each die.
probability of getting 1 on a die is 1/6.
probability of getting 1 on 2 dice is 1/6 × 1/6 = 1/36
C
Answer: (C) 1/36
Question: A bag contains 6 red, 5 blue and 2 green balls. If 2 ballsare picked at random, what is the probability that both are red?
(A) 2/13
(B) 1/15
(C) 5/26
(D) 3/25
(E) 4/17
Rationale: P(Both are red),
=6C213C2=6C213C2
=5/26
C
Answer: (C) 5/26
Question: If the simple interest on a sum of money at 5% per annum for 3 years is Rs.1200, find the compound interest on the same sum for the same period at the same rate.
(A) 1251
(B) 1261
(C) 1271
(D) 1281
(E) None
Rationale: Solution
Clearly, Rate	= 5% p.a.
Time	= 3 years
S.I	=Rs.1200.
So,Principal	=Rs.(100 x 1200/3x5)
=Rs.8000.
Amount	=Rs.[8000 x (1+5/100)³]
=Rs(8000x21/20x21/20x21/20)
= Rs.9261
C.I	=Rs.(9261-8000)
=Rs.1261.
Answer B
Answer: (B) 1261
Question: If x and y are different prime numbers, each greater than 2, which of the following must be true?
I. x+y is an even integer
II. xy is an odd integer
III. (x/y) is not an integer
(A) II only
(B) I and II only
(C) I and III only
(D) II and III only
(E) I, II, and III
Rationale: x and y are different prime numbers, both greater than 2
Statement I: x+y is an even integer
Since x and y are prime numbers greater than 2, they will be odd
Therefore sum will be even.
Correct
Statement II: xy is an odd integer
Since x and y are prime numbers greater than 2, they will be odd
Therefore multiplication will be odd.
Correct
Statement III: (x/y) is not an integer
Since x and y are prime integers, therefore they will not have any common factor apart from 1
Hence (x/y) will not be an integer
Correct
Hence all three statements I, II and III are correct
Option E
Answer: (E) I, II, and III
Question: Laya purchase 13 jars in a store then she returned 9 jars to store .Now how many jars she had?
(A) A)5
(B) B)11
(C) C)19
(D) D)9
(E) E)4
Rationale: 13-9=4. Answer is E
Answer: (E) E)4
Question: In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:
(A) 21/46
(B) 20/81
(C) 50/90
(D) 83/96
(E) 24/81
Rationale: Let S be the sample space and E be the event of selecting 1 girl and 2 boys.
Then, n(S)	= Number ways of selecting 3 students out of 25
= 25C3 `
=(25 x 24 x 23)
(3 x 2 x 1)
= 2300.
n(E)	= (10C1 x 15C2)
=[10 x(15 x 14)/(2 x 1)]
= 1050.
P(E) = n(E)/n(S) = 1050/2300 = 21/46.
Answer:A
Answer: (A) 21/46
Question: Here is another problem from Bhaskaracharya's Lilavati:
The square root of half the number of bees in a swarm has flown out upon a jasmine bush; eight ninths of the whole swarmhas remained behind; one female bee flies about the male that it buzzing within the lotus flower into which he was allured in the night by its sweet odour, but is now imprisoned in it. Tell me the number of bees?
(A) 33
(B) 72
(C) 54
(D) 13
(E) 59
Rationale: B
There were 72 bees.
Answer: (B) 72
Question: How much time will it take for an amount of Rs. 900 to yield Rs. 81 as interest at 4.5% per annum of simple interest?
(A) 1 year
(B) 2 years
(C) 3 years
(D) 4 years
(E) 5 years
Rationale: Explanation:
P = Rs.900
SI = Rs.81
T = ?
R = 4.5%
T= (100×SI)/PR = (100 × 81)/(900 × 4.5) = 2 years
Answer: Option B
Answer: (B) 2 years
Question: A man complete a journey in 10 hours. He travels first half of the journey at the rate of 21 km/hr and second half at the rate of 24 km/hr. Find the total journey in km.
(A) 220 km
(B) 224 km
(C) 230 km
(D) 234 km
(E) 240 km
Rationale: 0.5x/21 + 0.5x/24 = 10
x/21 + x/24 = 20
15x = 168 x 20
x = (168 x 20)/15 = 224 km.
answer B
Answer: (B) 224 km
Question: A train leaves Delhi at 9 a.m. at a speed of 30 kmph. Another train leaves at 2 p.m. at a speed of 35 kmph on the same day and in the same direction. How far from Delhi, will the two trains meet?
(A) 1050 km
(B) 1150 km
(C) 1250 km
(D) 1550 km
(E) 850 km
Rationale: D = 30 * 5 = 150
RS = 35 – 30 = 5
T = 150/5 = 30
D = 35 * 30 = 1050 km
ANSWER:A
Answer: (A) 1050 km
Question: A retailer buys 80 pens at the market price of 36 pens from a wholesaler, if he sells these pens giving a discount of 1%, what is the profit % ?
(A) 110
(B) 115
(C) 112
(D) 118
(E) 120
Rationale: let the market price of each pen be $1
then, Cost Price of 80 pens = $ 36 Selling Price of 80 pens =99% of $80=$ 79.20
profit %=((43.20*100)/36) %=120%
Answer E)120
Answer: (E) 120
Question: Pipe A can fill a tank in 6 hours, pipe B in 18 hours and pipe C in 36 hours. If all the pipes are open, in how many hours will the tank be filled ?
(A) 2.5 hours
(B) 2 hours
(C) 4 hours
(D) 3 hours
(E) None of these
Rationale: Explanation:
Part filled by A in 1 hour = 1/6
Part filled by B in 1 hour = 1/18
Part filled by C in 1 hour = 1/36
Part filled by (A+B+C) in 1 hour =
1/6+1/18+1/36=9/36
So all pipes will fill the tank in 4 hours.
Option C
Answer: (C) 4 hours
Question: A has work in 6 days and B has work in 8 days.What will be the days that A and B are worked together?
(A) 24/7
(B) 7/24
(C) 7
(D) 24
(E) 10
Rationale: A's one day work=1/6
B's one day work=1/8
A+B=1/6+1/8=7/24(one day)
They work together in 24/7 days.
Answer:option A
Answer: (A) 24/7
Question: Rs 4000 is divided into two parts such that one part is put out at 3% and the other at 5%. If the annual interest earned from both the investments be Rs 144, find the first part.
(A) Rs 4000
(B) Rs 2800
(C) Rs 3800
(D) Rs 3500
(E) Rs 3100
Rationale: Explanation :
Average rate = (144/4000)*100 = 3.6
Ratio = 14:6 = 7:3
So, first part = (7/10)*4000 = Rs 2800.
Answer : B
Answer: (B) Rs 2800
Question: Rs.8000 become Rs.9261 in a certain interval of time at the rate of 5% per annum of C.I. Find the time?
(A) 4
(B) 6
(C) 4
(D) 3
(E) 7
Rationale: 9261 = 8000(21/20)N
(21/20)3
= (21/20)N => N = 3
Answer: D
Answer: (D) 3
Question: In a race with 30 runners where 8 trophies will be given to the top 8 runners (the trophies are distinct: first place, second place, etc), how many ways can this be done?
(A) 8^8 ways
(B) 8^9 ways
(C) 7^8 ways
(D) 8^7 ways
(E) 8^6 ways
Rationale: 8 people can be prized with 8 distinct prizes in 8^8 ways
ANSWER:A
Answer: (A) 8^8 ways
Question: A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?
(A) 120 metres
(B) 180 metres
(C) 324 metres
(D) 150 metres
(E) 100 meters
Rationale: Speed=60 x5/18m/sec=50/3	m/sec.
Length of the train = (Speed x Time).
Length of the train =	50/3	x 9m = 150 m.
ANSWER:D
Answer: (D) 150 metres