# SBI Clerk 2018: Quantitative Aptitude Quiz for Prelims – 24

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Hello and welcome to exampundit. Here is a set of Quantitative Aptitude Quiz on Profit & Loss based problems for Prelims exam of SBI Clerk 2018. 1. The ratio between the ages of Rinky and Nicky is respectively 3: 5. Four years hence the sum of their ages would be 96 years. What would be the ratio between their ages after four years?
1) 8: 11
2) 9: 12
3) 7 : 9
4) 12 : 16
5) None of these

Option: 5

Explanation: R= 3x N= 5x
3x + 4 + 5x + 4 = 96
X = 11
R= 33 N=55

4 years hence the ratio= 37: 59

2. The ratio between the present ages of Vijay and Sanjay is 6: 7. Three years hence the ratio will become 7: 8 respectively. What is the present age of Vijay?
1) 17
2) 18
3)13
4)25
5) None of these

Option: 2

Explanation: V= 6x S=7x
6x + 3: 7x + 3= 7: 8
X = 3 V= 6 *3 = 18

3. The average age of a man and his son is 29 years. The ratio of their ages 4 years ago was 21: 4 respectively. What is the present age of the son?
1) 12
2)8
3) 10
4)14
5) None of these

Option: 1

Explanation: M + S= 29 *2
M +S =58
21x + 4 + 4x + 4=58
X = 2
S= 4 * 2= 8
Presently son’s age will be 8 +4 =12

4. Average age of 12 men is 20 years. If the age of one more man is added to it, the average is decreased by one. Find out the age of that man.
1) 5
2)7
3)9
4)19
5) None of these

Option: 4

Explanation: Total age= 12 *20 = 240
Total men = 12 + 1= 13 Decreased average= 20 -1= 19
Now total age= 13 * 19 = 247
Age= 247 -240 =7

5. The average age of 60 boys in a class was calculated as 12. It was later realized that the actual age of one of the boys in the class was 12.5, but it was calculated as 14. What is the actual average age of the boys in the class?
1) 11
2) 11.5
3) 11.75
4) 11.975
5) None of these

Option: 4

Explanation: Total age= 60 * 12 = 720
Extra age= 14- 12.5 = 1.5
780 – 1.5 = 718.5
Average age= 718.5 / 60 = 11.975

6. Average age of 36 children of the class is 15 years. 12 more children joined whose average age was 16 years. What is the average age of all the 48 children together?
1) 15.25
2) 15.5
3) 15.4
4) 15.3
5) None of these

Option: 1

Explanation: Total age of 36 children= 36 * 15 = 540
Total age of 12 children = 12 *16 = 192
Total age= 540 +192 = 732
Average age of 48 children is= 732 / 48 = 15.25

7. The ages of Vaibhav and Jagat are in the ratio of 12: 7 respectively. After 6 years the ratio of their ages will be 3: 2. What is the difference in their ages?
1) 8
2) 10
3) 12
4) 9
5) None of these

Option: 2

Explanation: V=12x J= 7x
12x + 6: 7x + 6 = 3:2
X = 2
V= 12* 2 = 24 J= 7 * 2 = 14
Difference age= 24 – 14 = 10

8. The average age of a man and his son is 44 years. The ratio of their ages is 31: 13. What is the son’s age?
1)35
2)26
3)15
4) 20
5) None of these

Option: 2

Explanation: Total age= 44 *2 = 88
Son’s age= 13/44 * 88 = 26

9. The average age of a man and his two twin sons born on the same day is 30 years. The ratio of the ages of father and one of his sons is 5: 2 respectively. What is the father’s age?
1)50
2)30
3)45
4)20
5) None of these

Option: 1

Explanation: Total age= 30 * 3= 90
5/ ( 5+2+2) * 90 = 50

10. The average of a man and his son is 40 years. The ratio of theirs is 7: 3 respectively. What is the man’s age?
1)70
2)63
3)56
4)49
5) None of these

Option: 3

Explanation: Total age= 40 * 2 =80
7 / 10 * 80 = 56

Regards

Team Exampundit

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