Question

A number consists of two digits whose sum is 9. If 27 is subtracted from the number its digits are reversed . Find the number.

Answer 1

the two digit number whose sum is 9 are
90 81 72 63 54 45 36
by sub 63-27= 36

Answer 2

if the number is xy than xy-27=yx

this shows thst number can be 54,63,72,81,90


54-27=27 meana wrong


but,


63-27=36

the number 63 is reversed by 36



thus 63 is your answer