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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.	3	B.	4
C.	9	D.	Cannot be determined
E.	None of these

Answer and Explanation

Answer:4

Explanation:
Let the ten's digit be x and unit's digit be y.
Then, (10x + y) - (10y + x) = 36
9(x - y) = 36
x - y = 4

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