Aptitude | Arithmetic Aptitude 5 | Question 1
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?
None of these
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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