Let the present age of Raju be ‘x’ According to the given information, The age of Raju after 15 years will be 5 times his age 5 years back. x+15=5(x–5) ⇒ x+15=5x–25 ⇒ 5x−x=15+25 ⇒ 4x=40⇒x=10 Raju is 10 years old now. Hence, '10' is the correct answer.