explain why 15 is not a prime number
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A prime number is only divisible by 1 and itself. ... No other whole numbers can multiply together to make 11. 15 is not a prime number because the factors of 15 are 1, 3, 5 and 15 ( ). 15 has more than 2 factors, so it is not a prime number.
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15 is not a prime number because the factors of 15 are 1, 3, 5, and 15 . 15 has more than 2 factors. Therefore, it is not a prime number.
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