Question

The sum of the two-digit number is equal to 9. also, nine times this number is twice the given number obtained by reversing the

Answer 1

Let us assume the number is ab. Then a+b=9, and 9(10a+b)=2(10b+a) upon simplifying it you will get 8a=b, now by substituting this in first equation you will get a=1, b=8. Therefore the number is 18.