Question

Three times the sum of the digits of a 2 digit number is equal to the number itself. Find the number. [Hint : 3(a+b)=10a+b)

Answer 1

3 (a+b)=10a+b
3a+3b=10a+b
7a-2b=0
7a=2b
a=2/7b here..... a and b is a digits so..value of b is only 7 is possible
so.. value of a is 2
so ..... no...is 27