Question

Raj is 12m years old his son was born when he was 9m years old
I:find rajs age 5 years later.
II: find the sum of their ages in 5 years time

Answer 1

(1) :17 years

(2):(13+4)+(14+5)+(15+6)+(16+7)+(17+8)

17+19+21+23+25

105.....