RikoteMaster/aqua-rat-mcqa huggingface dataset:
Question: A cargo ship carrying four kinds of items, doohickies, geegaws, widgets, and yamyams, arrives at the port. Each item weighs 2, 11, 5, and 7 pounds, respectively, and each item is weighed as it is unloaded. If, in the middle of the unloading process, the product of the individual weights of the unloaded items equals 104,350,400,000 pounds, how many widgets have been unloaded?
A.2
B.3
C.4
D.5
Answer: D.5
Explanation: We need to know the number of widgets (which weigh 5 pounds each). The number of times that 5 divides the number is related to the number of times that 10 divides the number.
When we divide 104,350,400,000 by 100,000, we get 104,350,400,000 = 1,043,504 * 5^5 *2^5.
1,043,504 is not divisible by 5, thus there are 5 widgets.
The answer is D.
Question: How much water must be added to 60 litres of milk at 1.5 litres for Rs. 20 So as to have a mixture worth Rs.32/3 a litre?
A.10 litres
B.12 litres
C.15 litres of water
D.18 litres
Answer: C.15 litres of water
Explanation: C.P. of 1 litre of milk = Rs. 20×2/3 = Rs. 40/3.
C.P. of 1 litre of water =Rs 0.
Mean price = Rs. 32/3.
By the rule of alligation, we have :
C.P of 1 litre C.P of 1 litre
of water of milk
(0) (Rs. 40/3)
\ /
Mean Price
(Rs. 32/3)
/ \
40/3−32/3 32/(3−0)
8/3 32/3
The ratio of water and milk =8/3:32/3.
=8:32=1:4.
Thus, Quantity of water to be added to 60 litres of milk:
=(1/4)×60 litres.
=15 litres. ANSWER : C
Question: Angelina walked 150 meters from her home to the grocery at a constant speed. She then walked 200 meters to the gym at double the speed. She spent 10 seconds less on her way from the grocery to the gym than on her way from home to the grocery. What was Angelina's speed, in meters per second, from the grocery to the gym?
A.2
B.3
C.4
D.10
Answer: D.10
Explanation: let the speed be X...
so time taken from home to grocery= 150/x..
the speed to gym = 2x..
so time taken = 200/2x=100/x..
its given 150/x-100/x=10
50/x=10
x=5m/secs..
so grocery to gym=2*5=10m/s...
Answer : D
Question: In a 1000 m race Usha beats Shiny by 50 m. In the same race, by what time margin Shiny beat Mercy who runs at 4 m/s ?
A.100 sec.
B.50 sec
C.25 sec
D.Data not sufficient
Answer: B.50 sec
Explanation: Speed of Shiny = 50/ 10 = 5m/s
Time taken by shiny to complete the race is B = 1000/5 = 200 sec.
Time taken by Baley to complete the race is D = 1000/4 = 250 sec.
Hence, D-B = 50 sec
ANSWER:B
Question: Insert the missing number. 2, 7, 10, 22, 18, 37, 26
A.26
B.22
C.2
D.52
Answer: D.52
Explanation: There are two series here
2, 10, 18, 26, ... (Increase by 8)
7, 22, 37, ... (Increase by 15)
Hence, next term is 37+15 = 52
Answer is D
Question: How many ways are there for 3 males and 3 females to sit (around a circular table) if no male should sit next to a male (and no female next to female) and Mary wants to sit with her back on the wall?
A.6
B.12
C.72
D.100
Answer: B.12
Explanation: Lets first sit the 3 man, 2! ways.
Now since one position is fixed for women, there are 2 women left and they have 2! ways
2! X 2! = 4 answer is diff this way.
or shall we give possibility of 3 ways for women to be fixed with back facing so 3! ways, ANS:B
Question: How many different values of positive integer x, for which |x+9|<x, are there?
A.0
B.2
C.3
D.8
Answer: C.3
Explanation: Answer C
I opted to put the random value option.
i used 0 , 9 , -9 and the the extreme of 10 and -10..
i was able to solve it in 1:09
C
Question: A man buys an article for 14% less than its value and sells it for 14% more than its value. His gain or loss percent is:
A.no profit, no loss
B.20% profit
C.less than 30% profit
D.more than 30% profit
Answer: D.more than 30% profit
Explanation: Let the article be worth Rs. x.
C.P. 86% of Rs. x = Rs. 86x/100
S.P. = 114% of Rs. x = Rs. 114x/100
Gain = (114x/100 - 86x/100) = Rs. 7x/25
Gain % = 7x/25 * 100/86x * 100 = 32 24/43 % > 30%
ANSWER:D
Question: If x is negative and y is positive, which of the following must be positive?
A.x/y
B.xy
C.2y + x
D.(x + y)^2 + 1
Answer: D.(x + y)^2 + 1
Explanation: A. x/y
-ve/+ve=-ve
will be negative
B. xy
-ve*+ve= -ve
will be negative
C. 2y + x
might be positive or negative . The sign will be depend on the absolute values of x and y . The expression will be positive if 2y>x
D. (x + y)^2 + 1
= (x+y)^2 will be positive irrespective of the absolute values of x and y
will be positive always
E. 3x/y
=- ve/ +ve
will be negative
Answer D
Question: In an election between 2 candidates, 50% of the voters cast their votes, out of which 10% of the votes were declared invalid. A candidate got 5000 votes which were 50% of the total valid votes. Find the total number of votes enrolled in that election?
A.16200
B.18000
C.17500
D.15823
Answer: B.18000
Explanation: Let the total number of votes enrolled be x.
Then, number of votes cast = 50% of x.
Valid votes = 90% of (50% of x)
50% of (90% of (50% of x)) = 4050
(50/100)*(90/100)*(50/100)x = 4050
x = 18000
Answer is B
Question: A license plate in the country Kerrania consists of four digits followed by two letters. The letters A, B, and C are used only by government vehicles while the letters D through Z are used by non-government vehicles. Kerrania's intelligence agency has recently captured a message from the country Gonzalia indicating that an electronic transmitter has been installed in a Kerrania government vehicle with a license plate starting with 79. If it takes the police 9 minutes to inspect each vehicle, what is the probability that the police will find the transmitter within three hours?
A.18/79
B.1/6
C.1/45
D.1/50
Answer: C.1/45
Explanation: If it takes 9 minutes to inspect one vehicle, the # of vehicles that can be inspected in 3 hours (180 minutes) = 180/9 = 20. Hence, for calculating the probability that the police will find the transmitter within three hours, the favorable cases = 20. Now, we need to figure out the total # of cases.
The total # of cases = Total # of such cars possible. The details given about the car is that it starts with 79, which leaves 2 more digits, both of which can be filled by all 10 numbers (0-9). In addition, we have 3 letters, each of which can be filled by any from the set {A,B,C}. Hence the total # of such cars possible = 10*10*3*3 = 900
So, the probability that the police will find the transmitter within three hours = 20/900 = 1/45. Option C
Question: Prathik purchased 40 shirts for rs 3000.he spends 10% for transportation. What should be the selling price per shirt to earn profit of 20% ?
A.96 rs
B.97 rs
C.98 rs
D.99 rupees
Answer: D.99 rupees
Explanation: total CP = 3000 + 3000*10/100 = 3300
to gain 20% profit, SP = (100+20)*3300/100 = 3960
selling price per shirt = 3960/40 = 99 rs/shirt
ANSWER:D
Question: A can do a certain job in 16 days. B is 60% more efficient than A. How many days does B alone take to do the same job?
A.11 1/4 days
B.8 days
C.5 days
D.10 days
Answer: D.10 days
Explanation: Ratio of times taken by A and B = 160 : 100 = 8 : 5.
Suppose B alone takes x days to do the job.
Then, 8 : 5 :: 16 : x = 8x = 5 x 16 =x = 10 days.
Answer is D.
Question: A can do a work in 22 days. B is 30% more efficient than A. How many days does B alone take to do the same job?
A.222/13
B.221/13
C.220/13
D.219/13
Answer: C.220/13
Explanation: Ratio of times taken by A and B = 130:100 = 13:10
suppose B alone to take x days to do the work
then, 13:10::22:x
13x= 10*22
x=220/13 days
correct option is C
Question: When Q is divided by X, the quotient is R and the remainder is E. Which of the following expressions is equal to E?
A.-RX + Q
B.RX - Q
C.Q + RX
D.QX - R
Answer: A.-RX + Q
Explanation: Q/X = R + E/W
Q -RX = E
Amswer: A
Question: The sum of the digits of a two-digit number is 15 and the difference between the digits is 3. What is the two-digit number?
A.69
B.78
C.96
D.56
Answer: C.96
Explanation: let the digits be x,y
x + y = 15
x - y = 3
2x = 18, x = 9 so y = 6
hence the number is 96
so the correct answer is option C) 96.
Question: If n is a natural number, then(6n^2+6n) is always divisible by?
A.6 only
B.6 and 12
C.12 only
D.by 18 only
Answer: B.6 and 12
Explanation: (6n^2+6n)=6n(n+1), which is always divisible by 6 and 12 both, since n(n+1) is always even.
Correct Option: B
Question: In a simultaneous throw of pair of dice .find the probability of getting the total more than 7
A.9/7
B.5/8
C.3/7
D.5/12
Answer: D.5/12
Explanation: Here n(S)=(6*6)=36
let E=event of getting a total more than 7
={(2,6),(3,5),(3,6),(4,4),(4,5),(4,6),(5,3),(5,4),(5,5),(5,6),(6,2),(6,3),(6,4),(6,5),(6,6)}
P(E)=n(E)/n(S)=15/36=5/12.
Ans: D
Question: Kul is 22 years old and Saras is 33 years. Find the ratio of Saras's age to Kul's age.
A.3/1
B.3/2
C.5/2
D.5/3
Answer: B.3/2
Explanation: Explanation :
Kul is 22 years old.Saras is 33 years old.Saras's age : Kul's age = 33 : 22 = 3 : 2
Answer : B
Question: What percent is 240 of 90?
A.133 1/3 %
B.134 1/3 %
C.135 1/3 %
D.266 2/3 %
Answer: D.266 2/3 %
Explanation: 240/90 = 8/3
8/3 × 100 = 800/3 = 266 2/3 %
D
Question: How long does a train 125 m long running at the speed of 78 km/hr takes to cross a bridge 125 m length?
A.12.7 sec
B.10.1 sec
C.11.5 sec
D.12.1 sec
Answer: C.11.5 sec
Explanation: Speed = 78 * 5/18
= 21.7 m/sec
Total distance covered
= 125 + 125 = 250 m.
Required time = 250/21.7 '
= 11.5 sec.
Answer:C
Question: The average of seven numbers is 18. The average of first three numbers is 14 and the average of last three numbers is 23. What is the middle number?
A.25
B.27
C.15
D.32
Answer: C.15
Explanation: The total of seven numbers = 7X18 = 126
The total of first 3 and last 3 numbers is = 3 X 14+3 X 23 = 111
So, the middle number is (126 - 111 ) = 15
C
Question: The compound ratio of 5:6, 5:2 and 4:5?
A.1:1
B.5:3
C.1:6
D.1:9
Answer: B.5:3
Explanation: 5/6 * 5/2 * 4/5 = 5/3
5:3
Answer: B
Question: A car runs at the speed of 40 km per hour when not serviced and runs at 80 kmph when serviced. After servicing the car covers a certain distance in 8 hours. How much time will the car take to cover the same distance when not serviced?
A.8 hours 12 minutes
B.12 hours
C.16 hours
D.17 hours
Answer: C.16 hours
Explanation: Explanation :
Time = 80*8 / 40 = 16 hours
Answer â€“ C
Question: The Julie's father's age is two more than thrice Julie's age. If Julie will be 15 after 4 years, what is her father's present age?
A.35 years
B.33 years
C.32 years
D.34 years
Answer: A.35 years
Explanation: LET AGE OF JULI BE 'J'
AGE OF HER FATHER BE 'F'
then given 3J+2=F
AND J+4=15
====>J=11 at present
then F=3*11+2
F=35
ANSWER:A
Question: Average score for Virat Kohli in a series of 10 matches is 38.9 runs. If the average for first six matches comes out to be 42 what is his average in the last 4 matches of the series?
A.34.25
B.34.28
C.24.252
D.64.28
Answer: A.34.25
Explanation: Explanation:
Average runs scored by Virat Kohli in 10 matches: Total runs scored/10—(1)
Average runs scored by Virat Kohli in 6 matches: (Total runs in 6 matches)/6
=> 42 = Runs/6
=>252 runs
Using (1):
=>38.9 = Runs/10
=>389 runs
Runs scored in rest 4 matches: 389 - 252 runs
=> 137 runs
Average runs scored by Virat Kohli in 4 matches: 137/4 = 34.25 runs
ANSWER: A
Question: The speed of boat in still water is 20 km/hr. If it travels 26 km downstream and 14 km upstream in same time, what is the speed of the stream?
A.6
B.7
C.8
D.9
Answer: A.6
Explanation: Explanation:
Let X be speed of stream
Speed of boat downstream = (20 + X )
Speed of boat upstream = (20 – X)
It is given that boat takes same time to travel 26 km downstream and 14 km upstream
[26/(20 +X)] = [14 / (20 – X)]
520 – 26 X = 280 + 14X
40X = 240
X = 6 km/hr
ANSWER: A
Question: Four barrels of water have an average capacity of 8 gallons. What is the maximum possible capacity of the smallest barrel Q if the median is 10 gallons?
A.1
B.2
C.3
D.4
Answer: B.2
Explanation: Suppose 4 barrels are B1, B2, B3, B4 in ascending capacity.
(B1+B2+B3+B4)/4 = 8
B1+B2+B3+B4=32
median is 10 ....... as the no. of terms are even i.e 4, median = (B2+B3)/2
==> B2+B3 = 20
now we have B1+B4 = 32-20 =12
Only the following possible cases can be there :
1,9,11,11
1,10,10,11
2,10,10,10
Max value of smallest barrel Q= 2
Question: Set J consists of 5 consecutive even numbers. If the smallest term in the set is -2, what is the range of the positive integers in set J?
A.0
B.2
C.4
D.6
Answer: C.4
Explanation: Since there are only 5 integers, another approach is the just list all 5.
We get: -2,0,2, 4, 6
Range of POSITIVE INTEGERS =6 - 2= 4
Answer: C
Question: What is the measure of the acute angle between the hour and minute hands of a correctly
working clock at 4:18 ?
A.12◦
B.15◦
C.18◦
D.21◦
Answer: D.21◦
Explanation: Consider an axis through the center of the clock with direction, the direction of the hands of the
clock at 12:00. At 4:18 the angle between the axis and the hour hand is
(4+18/60)*360◦/12=129◦
The angle between the axis and the minute hand is 18/60*360◦=108◦
correct answer D
Question: A and B can do a piece of work in 7 days. With the help of C they finish the work in 5 days. C alone can do that piece of work in?
A.15.5 days
B.19.5 days
C.17.5 days
D.16.5 days
Answer: C.17.5 days
Explanation: C = 1/5 – 1/7 = 2/35 => 17.5 days
ANSWER:C
Question: A train 300 m long is running at a speed of 99 km/hr. In what time will it pass a bridge 195 m long?
A.17
B.18
C.19
D.20
Answer: B.18
Explanation: Speed = 99 * 5/18 = 55/2 m/sec
Total distance covered = 300 + 195 = 495 m
Required time = 495 * 2/55 = 18 sec
Answer: B
Question: A bag contains 12 white and 18 black balls. 2balls are drawn in succession. What is the probability that first is white and second is black?
A.13/213
B.36/145
C.25/113
D.27/137
Answer: B.36/145
Explanation: The probability that first ball is white:
=12C130C1=12C130C1
=1230=1230
=25=25
Since, the ball is not replaced; hence the number of balls left in bag is 29.
Hence, the probability the second ball is black:
=18C129C1=18C129C1
=1829=1829
Required probability,
=(25)×(1829)=(25)×(1829)
=36/145
B
Question: A can finish a work in 36days, B in 9days and C in 2days, B and C start the work but are forced to leave after 3 days. The remaining work was done by A in?
A.15days
B.12days
C.6days
D.7days
Answer: A.15days
Explanation: B+C 1day work = 1/9 + 1/12 = 7/36
work done by B and C in 3days = 7/36 * 3 = 7/12
Remaining work = 1 - 7/12 = 5/12
1/36 work is done by A in 1day
5/12 work is done by A in 36*5/12 = 15days
Answer is A
Question: A and B can do a work in 5 days and 10 days respectively. A starts the work and B joins him after 2 days. In how many days can they complete the remaining work?
A.7 days
B.2 days
C.5 days
D.3 days
Answer: B.2 days
Explanation: B
2 days
Work done by A in 2 days = 2/5
Remaining work = 3/5
Work done by both A and B in one day = 1/5 + 1/10 = 3/10
Remaining work = 3/5 * 10/3 = 2 days.
Question: A train passes a station platform in 32 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?
A.180 m
B.160 m
C.240 m
D.207 m
Answer: A.180 m
Explanation: Speed = [54 * 5/18] m/sec
= 15 m/sec.
Length of the train = (15 * 20) m = 300 m.
Let the length of the platform be x meters.
Then, x + 300 / 32 = 15
x + 300 = 480
x =180m.
Answer: A
Question: In how many a committee of 5 members can be selected from 6men 5 ladies consisting of 3 men and 2 ladies
A.231
B.150
C.200
D.450
Answer: C.200
Explanation: (3 men out of 6) and (2 ladies out of 5) are to be chosen
Required number of ways
=(6C3 * 5C2)
= 200
Ans: C
Question: Nine men went to a hotel. Eight of them spent Rs.3 each over their meals and the ninth spent Rs.2 more than the average expenditure of all the nine. Determine the total money spent by them?
A.29.25
B.29.28
C.79.28
D.29.22
Answer: A.29.25
Explanation: Average of 9 = x
9x = 8 * 3 + x * 2 x = 3.25
Total = 9 * 3.25 = 29.25
Answer: A
Question: The current of a stream runs at the rate of 4 kmph. A boat goes 6 km and back to the starting point in 2 hours, then find the speed of the boat in still water?
A.6
B.7
C.8
D.5
Answer: C.8
Explanation: S = 4
M = x
DS = x + 4
US = x - 4
6/(x + 4) + 6/(x - 4) = 2
x = 8
Answer:C
Question: A train covers a certain distance at a speed of 340kmph in 4 hours. To cover the same distance in 2 3/4 hours, it must travel at a speed of
A.495km/hr
B.420km/hr
C.450km/hr
D.550km/hr
Answer: A.495km/hr
Explanation: Explanation:
Distance = 340Ã—4 = 1360km
Required speed = (1360Ã— 4/11) = 495km/hr
Answer: Option A
Question: 6 people meet for a business breakfast. Each person shakes hands once with each other person present. How many handshakes take place?
A.30
B.21
C.18
D.15
Answer: D.15
Explanation: Let's look at the logic.
Every person shakes hand with other '5'. So, 6 people shake hands with 6X5= 30 people
But in this 30 we have counted two times the total handshakes (c shakes hand with d and d shakes hand with c)
So just divide 30/2= 15 total handshakes
Answer is D
Question: Find the odd man out?
396, 462, 572, 427, 671, 264.
A.2378
B.427
C.297
D.2678
Answer: C.297
Explanation: Explanation:
In each number except 427, the middle digit is the sum of other two.
Answer: C) 427
Question: To deliver an order on time, a company has to make 25 parts a day. After making 25 parts per day for 3 days, the company started to produce 5 more parts per day, and by the last day of work 100 more parts than planned were produced. Find how many parts the company made and how many days this took.
A.347
B.3667
C.387
D.675
Answer: D.675
Explanation: Let xx be the number of days the company worked. Then 25x is the number of parts they planned to make. At the new production rate they made:
3⋅25+(x−3)⋅30=75+30(x−3)3⋅25+(x−3)⋅30=75+30(x−3)
Therefore: 25x=75+30(x−3)−10025x=75+30(x−3)−100
25x=75+30x−90−10025x=75+30x−90−100
190−75=30x−25190−75=30x−25
115=5x115=5x
x=23x=23
So the company worked 23 days and they made 23⋅25+100=67523⋅25+100=675 pieces.
Answer:D
Question: The average weight of 8 persons increases by 4 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person ?
A.75 kg
B.65 kg
C.55 kg
D.97 kg
Answer: D.97 kg
Explanation: Total weight increased = (8 x 4) kg = 32 kg.
Weight of new person = (65 + 32) kg = 97 kg.
Answer: D
Question: Which of the following statements is not correct?
A.	log10 (10) = 1
B.	log (2 + 3) = log (2 x 3)
C.	log10 (1) = 0
D.	log (1 + 2 + 3) = log 1 + log 2 + log 3
A.log10 (10) = 1
B.log (2 + 3) = log (2 x 3)
C.log10 (1) = 0
D.log (1 + 2 + 3) = log 1 + log 2 + log 3
Answer: B.log (2 + 3) = log (2 x 3)
Explanation: (a) Since loga (a) = 1, so log10 (10) = 1.
(b) log (2 + 3) = log 5 and log (2 x 3) = log 6 = log 2 + log 3
log (2 + 3) log (2 x 3)
(c) Since loga (1) = 0, so log10 (1) = 0.
(d) log (1 + 2 + 3) = log 6 = log (1 x 2 x 3) = log 1 + log 2 + log 3.
So, (b) is incorrect.
Answer is B.
Question: Three positive integers a, b, and c are such that their average is 24 and a ≤ b ≤ c. If the median is (a + 11), what is the least possible value of c?
A.23
B.25
C.27
D.29
Answer: D.29
Explanation: Solution:
We know that the average value is 24 therefore (a+b+c)/3 = 24
so a+b+c = 72
and b = a + 11
therefore a + (a + 11) + c = 72
The least value of c is when c = b
so take c = a + 11
hence, a + (a + 11) + (a + 11) = 72
i.e., a = 50/3 a non integer therefore c is not equal to b
so take c = b+1 therefore c = a+12
a + (a + 11) + (a + 12) = 72
i.e., a= 49/3 again a non integer therefore c is not equal to b+1
next take c= b+2 therefore c = a+13
a + (a + 11) + (a + 13) = 72
i.e., a=48/3 = 16
hence, a = 16, b = 27, and c = 29
Answer: D
Question: X and Y run a 100m race,where X beats Y by 20 m. To do a favor to Y, X starts 10m behind the starting line in a second 100m race. Both run at the same previous speed. Which of the following is true?
A.X Beats Y by 2m
B.X Beats Y by 0.5 m
C.X Beats Y by 4 m
D.Y Beats X by 10m
Answer: C.X Beats Y by 4 m
Explanation: Let's suppose that the speed of X is 10m/s and that the speed of Y is 8m/s.
So, in the first race, the results are the following:
X crosses the finish line in 10s. In other words, X has run 100m in 10 s.
In 10s, Y has run 80 meters.
Therefore, there is the difference of 20 meters mentioned in the question.
Now, let's review the second race.
In 12 seconds, X can complete the 120 meters race. We have to remember that X is 20 meters behind the starting line.
But in 12 seconds, Y has covered (80+16) =96 meters. Also, it is important to notice that in 12 seconds Y cannot arrive to the finish line.
So, 100 - 96 = 4 meter
Answer: C
Question: A particular store purchased a stock of turtleneck sweaters and marked up its cost by 20%. During the New Year season, it further marked up its prices by 25% of the original retail price. In February, the store then offered a discount of 25%. What was its profit on the items sold in February?
A.12.5%
B.30%
C.35%
D.37.5%
Answer: A.12.5%
Explanation: Assume the total price = 100x
Price after 20% markup = 120x
Price after 25%further markup = 1.25*120x = 150x
Price after the discount = 0.75*150x = 112.5x
Hence total profit = 12.5%
Option A
Question: Which of the following fractions terminates?
A.3/160
B.5/900
C.7/220
D.9/120
Answer: A.3/160
Explanation: For a fraction to have terminating decimal, it must either have only 2 and/or 5 in the denominator. All other values in the denominator leads to non terminating decimal values
Hence,
1. 160 = 2 * 2 * 2 * 2 * 2 * 5, hence is terminating
2. There is a 3 in the denominator, hence it is a non terminating decimal
3. There is an 11 in the denominator, hence it is a non terminating decimal
4. There is a 3 in the denominator, hence it is a non terminating decimal
5. There is an 11 in the denominator, hence non terminating
Option A
Question: A train consists of 12 boggies, each boggy 15 metres long. The train crosses a telegraph post in 9 seconds. Due to some problem, three boggies were detached. The train now crosses a telegraph post in
A.6.75 sec
B.12 sec
C.15 sec
D.20 sec
Answer: A.6.75 sec
Explanation: Length of train = 12 Ã— 15 = 180 m.
Then, speed of train = 180â„9 = 20 m/s
Now, length of train = 9Ã— 15 = 135m
âˆ´ Required time = 135â„20 = 6.75 sec.
Answer A
Question: Two trains travel in opposite directions at 36 kmph and 45 kmph and a man sitting in slower train passes the faster train in 8 seconds. The length of the faster train is
A.80 m
B.100 m
C.120 m
D.180 m
Answer: D.180 m
Explanation: Solution
Relative Speed	= (36 + 45) km/hr
= (81 x 5/18) m/sec
= (45/2) m/sec
Length of the train	= (45 / 2 x 8) m
= 180 m.
Answer D
Question: A shopkeeper labeled the price of his articles so as to earn a profit of 40% on the cost price. He then sold the articles by offering a discount of 10% on the labeled price. What is the actual percent profit earned in the deal?
A.26%
B.20%
C.17%
D.18%
Answer: A.26%
Explanation: Explanation:
Let the CP of the article = Rs.100.
Then labeled price = Rs.140.
SP = Rs.140- 10% of 140 = Rs.140-14 = Rs.126.
Gain = Rs.126 â€“ Rs.100 = Rs.26
Therefore, gain/profit percent = 26%.
Answer: Option A
Question: If A lends Rs.3500 to B at 10% per annum and B lends the same sum to C at 11.5% per annum then the gain of B in a period of 3 years is?
A.99.222
B.223.22
C.157.5
D.222.88
Answer: C.157.5
Explanation: (3500*1.5*3)/100
=> 157.50
Answer: C
Question: Three workers have a productivity ratio of 2 to 5 to 9. All three workers are working on a job for 4 hours. At the beginning of the 5th hour, the slowest worker takes a break. The slowest worker comes back to work at the beginning of the 9th hour and begins working again. The job is done in ten hours. What was the ratio of the work performed by the fastest worker as compared to the slowest?
A.12 to 1
B.6 to 1
C.15 to 2
D.1 to 6
Answer: C.15 to 2
Explanation: The fastest worker who does 9 units of job worked for all 10 hours, so he did 9*10=90 units of job;
The slowest worker who does 2 unit of job worked for only 4+2=6 hours (first 4 hours and last 2 hours), so he did 2*6=12 units of job;
The ratio thus is 90 to 12, or 15 to 2.
Answer: C.
Question: A committee has 4 men and 6 women. What are the number of ways of selecting 2 men and 3 women from the given committee?
A.127
B.120
C.882
D.272
Answer: B.120
Explanation: The number of ways to select two men and three women
= 4C₂ * ⁶C₃
= (4*3 )/(2 * 1) * (6 * 5 * 4)/(3 * 2)
= 120
Answer: B