Question

two digit number is four times the sum of the digits. if 36 is added to the number, the digits interchange their places. find the number​

Answer 1

Step-by-step explanation:

Let the tens and unit digit of number are =x,y respectively

First condition :

$= > 10x + y = 4(x + y) = > 2x = y \\ Second condition : \\ = > 10x + y + 18 = 10y + x \\ = > x - y = - 2 \\ = > x - 2x = - 2 \\ = > x = 2 \\ = > y = 4$