13. The sum of the present ages of a son and his father is 60 years. Six years ago, father's age was five times the age of the son. After 6 years, what will be son's age?
A. 20
B. 21
C. 22
D. 23

Explanation:
Let father's age be F
let spn's age be S
F+S=60
(F-6)=5*(S-6)
S=14

S+6=20

14.Prem is younger than Harish by 7 years and their ages are in the respective ratio of 7 : 9. How old is Kiran?
A. 23.5
B. 25
C. 24.5
D. 24

Explanation:
Let Prem's age be P
Let Harish's age be H
P=H-7
P/H=7/9

P=24.5

15. My brother is 3 years elder to me. My father was 28 years of age when my sister was born while my mother was 26 years of age when I was born. If my sister was 4 years of age when my brother was born, then what was the age of my father when my brother was born?
A. 32 years
B. 35 years
C. 33 years
D. 34 years

Explanation:

Let my age be x
Then My brother's age =x+3
My mother's age =x+26
My sister's age =(x+3)+4=x+7
My father's age (x+7)+28=x+35
Age of my father when my brother was born
=x+35-(x+3)
=32

16. Six years ago, the ratio of the ages of Vinit and Santi was 6 : 5 . Four years hence, the ratio of their ages will be 11 : 10 . What is Santi's age at present?
A. 16 years
B. 15 years
C. 17 years
D. 18 years

Explanation:

Let Vinit's present age be V
Let Santi's present age be S
(V-6)/(S-6)=6/5
V+4/S+4=11/10

S=16

17. At present, the ratio between the ages of Nobita and Shizuka is 4 : 3 . After 6 years, Nobita's age will be 26 years. Find out the age of Shizuka's at present?
A. 14
B. 15
C. 12
D. 13

Explanation:
let Nobita's age be N
Let Shizuka's age be S
N/S=4/3
N+6=26
N=20

S=15

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