father tels his son,i was of ur present age wen u r born.if the father is 36 now.age of boy 5 yrs back?

Answer 1

If the father was the son's present age when the son was born, he is now twice the son's age, so the son is 18. So five years ago the son was 13.

Answer 2

If father is twice the son's age that means the son is 18 years now.

5 years ago, the son was 13 years old (18-5)

Answer 3

Let x = the boy's age now
2x = the Father's age when son was born
x - 5 = boy's age 5 years back

2x = 36
x = 36/2
x = 18 years old ==> boy's age now
18 - 5 = 13 years ==> boy's age 5 years back

Answer 4

13