Is 15 prime?

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Multiple Choice

Is 15 prime?

Explanation:
A prime number has exactly two distinct positive divisors: 1 and the number itself. If a number has any other positive divisor, it isn’t prime. For 15, you can find factors other than 1 and 15: it’s divisible by 3 and by 5, so the divisors are 1, 3, 5, and 15. That means it has more than two divisors, so it’s not prime. So the correct answer is No.

A prime number has exactly two distinct positive divisors: 1 and the number itself. If a number has any other positive divisor, it isn’t prime. For 15, you can find factors other than 1 and 15: it’s divisible by 3 and by 5, so the divisors are 1, 3, 5, and 15. That means it has more than two divisors, so it’s not prime. So the correct answer is No.

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