Question

Sum of the digits of a two digits number is 9. When we interchange the digits, it is found that the resulting new number is greater than the original number by 45

Answer 1

Answer:x+y=9

Num=10x+y

Rev num=10y+x

10y+x-(10x+y)=45

9y-9x=45

x-y=5

x+y=9

x-y=5

______

2x=14

x=7

y=2