Quantitative Aptitude Quiz for SBI PO | IBPS – Set 121

1) The average weight of 8 person’s increases by 2.5 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) 76 kg
b) 76.5 kg
c) 85 kg
d) Data inadequate
e) None of these

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Answer c) 85 kg
Total weight increased = (8 x 2.5) kg = 20 kg.
Weight of new person = (65 + 20) kg = 85 kg.

2) The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?
a) 4
b) 8
c) 16
d) None of these

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Answer b) 8
Since the number is greater than the number obtained on reversing the digits, so the ten’s digit is greater than the unit’s digit.
Let ten’s and unit’s digits be 2x and x respectively.
Then, (10 x 2x + x) – (10x + 2x) = 36
9x = 36
x = 4.
Required difference = (2x + x) – (2x – x) = 2x = 8.

3) The sum of the present ages of a father and his son is 60 years. Six years ago, father’s age was five times the age of the son. After 6 years, son’s age will be:
a) 12 years
b) 14 years
c) 18 years
d) 20 years

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Answer d) 20 years
Let the present ages of son and father be x and (60 -x) years respectively.
Then, (60 – x) – 6 = 5(x – 6)
54 – x = 5x – 30
6x = 84
x = 14.
Son’s age after 6 years = (x+ 6) = 20 years

4) Three candidates contested an election and received 1136, 7636 and 11628 votes respectively. What percentage of the total votes did the winning candidate get?
a) 57%
b) 60%
c) 65%
d) 90%

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Answer a) 57%
Total number of votes polled = (1136 + 7636 + 11628) = 20400.
Required percentage = 11628/20400 x 100% = 57%.

5) In a certain store, the profit is 320% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit?
a) 30%
b) 70%
c) 100%
d) 250%

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Answer b) 70%

6) In 100 m race, A covers the distance in 36 seconds and B in 45 seconds. In this race A beats B by:
a) 20 m
b) 25 m
c) 22.5 m
d) 9 m

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Answer a) 20 m

7) A box contains 2 white balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the box, if at least one black ball is to be included in the draw?
a) 32
b) 48
c) 64
d) 96
e) None of these

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Answer c) 64

8) Find the odd man out.
10, 14, 16, 18, 21, 24, 26
a) 26
b) 24
c) 21
d) 18

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Answer c) 21
Each of the numbers except 21 is an even number.

9) Find the odd man out.
835, 734, 642, 751, 853, 981, 532
a) 751
b) 853
c) 981
d) 532

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Answer a) 751
In each number except 751, the difference of third and first digit is the middle one.