Multiple choice general knowledge math & puzzles

Which one of the following numbers is exactly divisible by 11?

  1. 235641

  2. 245642

  3. 315624

  4. 415624

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

To check divisibility by 11, calculate the alternating sum of digits. For 415624: 4-1+5-6+2-4 = 0. Since the result is 0 (which is divisible by 11), the number 415624 is divisible by 11. The other options fail this test.