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252 can be expressed as a product of primes as:

2 x 2 x 3 x 3 x 7
2 x 2 x 2 x 3 x 7
3 x 3 x 3 x 3 x 7
2 x 3 x 3 x 3 x 7

Correct Answer: 2 x 2 x 3 x 3 x 7

Explanation:

Clearly, 252 = 2 x 2 x 3 x 3 x 7

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