Question

4 The difference between a number of two digit and the
number obtained interchanging its digits is 63. What
is the difference between its digits?
(a) 5
(d) 8
(b) 6
(c) 7​

Answer 1

Answer:

7

Step-by-step explanation:

10x+y-10y-x=63

or, 9(x-y)=63

or, x-y=7

Hence difference of its digits is 7