Multiple choice general knowledge math & puzzles

If k is divisible by 2, 3, and 15, which of the following is also divisible by these numbers?

  1. k+5

  2. k+15

  3. k+20

  4. k+30

  5. k+45

  6. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

If k is divisible by 2, 3, and 15, it must be a multiple of their LCM, which is 30. For (k + x) to be divisible by 30, x must also be a multiple of 30. Only k+30 satisfies this condition.

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