The difference between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two digits of that number?
(A)
4
(B)
5
(C)
6
(D)
None of these
Answer: (A)
Explanation:
Let the ten’s digit be x and the unit’s digit be y
Then (10x + y) – (10y + x) = 36
9(x – y) = 36
x – y = 4
Hence Option (A) is correct.
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