CAT Quant Practice Problems

Question: A positive integer is said to be a prime number if it is not divisible by any positive integer other than itself and 1. Let p be a prime number greater than 5. Then (p2 – 1) is
  1. never divisible by 6
  2. always divisible by 6, and may or may not be divisible by 12.
  3. always divisible by 12, and may or may not be divisible by 24.
  4. always divisible by 24.

Correct Option:4

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CAT Quant Practice Problems
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