Question

The unit digit of a two-digit number is 3 and 7 timesthe sumof me digits is the number itself. find the number

Answer 1

Let the units digit be u

tens digit be t

Number is 10t+u

7(u+t) = 10t+u

7t + 7u = 10 t+u

6u = 3t

t = 2u

u = 3

So, t = 6

Number is 10t+u = 10(6)+3 = 63