Question

The digits of a two-digit number differ by 3. If digits are interchanged

and the resulting number is added to the original number, we get 121.
Find the original number

Answer 1

47

Explanation:

4 and 7 have a difference of 3. And if the digits are interchanged, the number is 74

47 + 74 = 121 so 47 is the original number.