The difference between a two digit number and the number obtained by interchanging its digits is 63 . What is the difference between the digits of the number ?

Let the digit in the units place of the number be x

and the number in the tens place be y.

Then the number = 10*y +x = 10y + x

On reversing the digits,

the number obtained = 10x + y

BTP,

(10y + x) - (10x + y) = 63

=> 10y + x - 10x - y = 63

=> x - y = 63

Therefore,

the difference between the two digits = x- y = 63

A n s . )      63

Hope it helps!!!

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