Question

The digits of a two digit number differ by 3. If the digits are interchanged, and the resulting number is added to the original number, we get 121

Answer 1

Answer:

41 or 14

Step-by-step explanation:

let the digit at unit place be x and the digit at tens place be y for the otiginal number...

thus ,the no. is 10x+y

if the digits are inerchanged..

the no. will be 10y+x

given, x-y = 3

also, 10x + y + 10y + x = 121

11x + 11y = 121

x + y. = 11

x+y = 11

x-y = 3

2x = 8

x = 4

and y = 11-4 = 3