Multiple choice

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?

  1. 3

  2. 4

  3. 9

  4. Cannot be determined

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
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

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