Question

A number is 27 more than the number obtained by reversing its digits. If its unit's and ten's digit are x and y?

Answer 1

Answer:

Let the number digit of unit is x and ten number digit is y

Then number=x+10y

If we reversing number digit by ten number digit the number =y+10x

Given that the number is 27 more then reversed number

So(x+10y)−(y+10x)=27

Or x+10y−y−10x=27

Or 9y−9x−27=0

Or y−x−3=0