Question

In a 2-digit, digit in units place is tiwce the digit in tens plave. If 27 is added to it .what is the number

Answer 1

Let us assume, x is a tenth place digit and y is the unit place digit of a two-digit number.

Therefore, the two-digit number = 10x + y and the reversed number = 10y + x

Given:

y = 2x -----------1

Also given:

10x + y + 27 = 10y + x

9y - 9x = 27

y - x = 3

Substitute the value of y from equation 1 in equation 2

2x - x = 3

x = 3

Therefore y = 2x = 2 * 3 = 6

= 10x + y = 10*3 + 6 = 36

hope it helps......