Question

The digits of a two digit number differ by 3. if the digits are interchanged and the resulting no. is added to the original no. we get 121. Find the original number ?​

Answer 1

Answer:

Step-by-step explanation:

Let the number be 10x + (x-3)

Interchanged = 10(x-3) + x

Therefore we have,

10x + (x-3) + 10(x-3) + x = 121

10x + x-3 + 10x - 30 + x = 121

10x + x + x + 10x - 30 - 3 = 121

22x -33 = 121

22x = 154

x = 154/22

x = 7

Therefore the number is 74