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Quantitative - Mathematics - Word Problems:

Number System - All NUMBERS on the Tests

MCQ - 101-12868

Question:

Difference between a two-digit number and the number obtained by interchanging the two digits is 36, what is the difference between two numbers

  1. 2
  2. 4
  3. 8
  4. 4

Correct Answer: B

Explanation:

Let the ten digit be x, unit digit is y.
Then (10x + y) - (10y + x) = 36
=> 9x - 9y = 36
=> x - y = 4.

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