Which number is not prime among 2, 3, 4, 5, 7?

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Multiple Choice

Which number is not prime among 2, 3, 4, 5, 7?

Explanation:
Prime numbers are numbers greater than 1 that have exactly two distinct positive divisors: 1 and the number itself. Among the given numbers, 2, 3, 5, and 7 each have only those two divisors, so they are prime. The number 4 can be divided by 1, 2, and 4, which means it has more than two divisors; it is not prime. In fact, 4 = 2 × 2, making it a composite number.

Prime numbers are numbers greater than 1 that have exactly two distinct positive divisors: 1 and the number itself. Among the given numbers, 2, 3, 5, and 7 each have only those two divisors, so they are prime. The number 4 can be divided by 1, 2, and 4, which means it has more than two divisors; it is not prime. In fact, 4 = 2 × 2, making it a composite number.

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