A father tells his son, “I was of your present age when you were born”. If the father is 36 now, how old was the boy five years back ?
13
15
17
20
Explanation:
Let the fathers age be x and the sons age be y.
Then, x – y = y or x = 2y,
Now, x = 36. So, 2y = 36 or y = 18.
Therefore Sons present age = 18 years.
So, sons age 5 years ago = 13 years.
Let the fathers age be x and the sons age be y.
Then, x – y = y or x = 2y,
Now, x = 36. So, 2y = 36 or y = 18.
Therefore Sons present age = 18 years.
So, sons age 5 years ago = 13 years.