Question

what is the number if 27 is subtracted from it the differnce will be 21?

Answer 1

Answer:

Let us assume, x and y are the two digits of the two-digit number

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

Given:

x+y=9

also given:

10x + y - 27 = 10y + x

9x - 9y = 27

x - y = 3

Adding equation 1 and equation 2

2x = 12

x = 6

Therefore, y = 9-x=9-6=3

The two-digit number = 10x + y = 10*6 + 3 = 63

Answer 2

Let the the number be n .

one number = 27

Difference =21

So, n-27=21

=> n = 21+27

=> n = 48.

So, 48 should be substracted to 27 to get 21