Please solve it before u see the answer : Shilpa is 21 years older than her son Raju. In 6 years from now Shilpa will be 5 times as old as Raju. Question: Where's Shilpa's Husband? (There IS a mathematical solution for this.. try it before scrolling down) -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Solution: Shilpa (MOM 'M') is 21 years older than Raju (Child 'C '). M = C + 21 In 6 years from now the mom will be 5 times as old as the child. M + 6 = ( C + 6 ) x 5 C + 21 + 6 = ( C + 6) x 5 C + 27 = 5C + 30 -3 = 4C C = -3/4 The child is -3/4 year old, that's -9 months. Child will be born in 9 months. So, now you know where is Shilpa's husband