alex age after 13 years will be 10 times his age 10 years back . what is the present age of alex ?
let alex ' s present age be x alex ' s age after 17 years = x + 17 alex ' s age 10 years back = x - 10 x + 17 = 10 ( x - 10 ) x = 13 rajeev ' s present age = 13 years answer is b
divide(add(multiply(const_10, const_10), 13), subtract(const_12, const_3))