Question

the ones digit of 2 - digits number is twice the tens digit. when the number formed by reversing the digit s is added to the original number the sum is 99 .find the original number ​

Answer 1

let number is ( 10y + x )

according to the question

x = 2y ........(1)

and

10y + x + 10x + y = 99......(2)

on solving equations (1) and (2)

the numbers are 36 and 63