Question

the Sum of digits of a two digit number is 12.if the new number formed by reversing the digit is greater than the original number by 54,find the original number​

Answer 1

let no be xy

x+ y= 12

reverse yx

yx = xy +54

10 y + x= 10 x +y +54

9( y-x) = 54

y- x = 6

also x+ y = 12

add

2y = 18

y= 9

x= y-6 = 3

So 39