Question

One of the 2 digit number is 3 times the other digit if you interchange the digits of this two digit number and add the resulting number to the original number you get 88 what is original number

Answer 1

Assume that ones digit is= x

then ten's digit will=3x

So number = 10×3x + x= 31x

After interchanging the digits:

ones digit will be= 3x

and tens digit will= x

So number = 10×x + 3x= 13x

According to the question:

31x + 13x = 88

44x = 88

x = 88/44 = 2

so ones digit is= 2 and tens digit will be= 3x= 3×2=6

And number is= 62