Question

sum of a digits of a two digit number is 12.if the digits are same,what is the number?​

Answer 1

Answer:

Let the digit at the tens place be x and the digit at the unit place be y. Required Number = (10x+y). Number obtained on reversing the digits = (10y+x). Hence, the required number is 57.

Answer 2

Answer:

one digit is 12

so, second digit also 12

=12-12

=0