Question

sum of 2 digits of the number ad the number obtained by interchanging is 55.which of the following could be the difference betwee the digitsof the number

Answer 1

Let the ten's digit be x and unit's digit be y.

Then, number = 10x + y.

Number obtained by interchanging the digits = 10y+ x.

(10x + y) + (10y + x) = 11(x + y), which is divisible by 11.