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

never divisible by 6
always divisible by 6, and may or may not be divisible by 12.
always divisible by 12, and may or may not be divisible by 24.
always divisible by 24.
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CAT Quant Practice Problems
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