Question

He sum of the digits of a two digit number is 15 and the difference of the digits is 3. then the product of the digits is

Answer 1

let one number be X and another be y

according to first condition
x+y=15......1

By second condition
x-y=3........2
adding equation.1 and .2
x+y=15
x-y=3
2x=18
x=9

put x is equal to 9 in equation 1
9+y=15
y=6

their phone number is equal to 9 and 6