Mathematics for IGCSE & O level - The Four Operations (Section 6 - No. 41) | ExamPlay

Mathematics for IGCSE & O level - The Four Operations (Section 6 - No. 41)

Which of the following numbers is NOT a prime number?

2

3

5

9

Explanation

Prime numbers only have 2 factors: 1 and itself. 9 is divisible by 1, 3, and 9.

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