Question

A number is obtained by reversing it's original number is 12.t hen find the number?

Answer 1

THE ANSWER OF THE GIVEN QUESTION IS

REVERSED NUMBER = 12
SO REAL NUMBER = 21


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The sum of the digits of a 2-digit number is 12. If the digits are reversed, the new number is 18 greater than the original number. What is the original number?

Let unit place is x and tenth place is y so

Condition 1

x +y = 12

Condition 2 if digit reversed

y +10x = x + 10y -18

y + 10x -x - 10y= -18

9x -9y = -18

9y -9x =18

9y- 9(12–y)= 18

9y-108+9y=18

18y= 18+108

y = 126/18

y= 7

So x = 12–7 =5

Original number = 10x +y = 10x5+7= 57