Lessons

General Aptitude
27.1 Problems on Numbers - General Questions

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Q.

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?

View Answer

Correct choice: B

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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