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Q: Is 15 a prime number why or why not?

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15 is a factor of 45, but it is not a prime number.

2 is a prime number and 15 is a composite number.

5 is but 15 is not a prime number

3 x 5 = 15, so 15 is not a prime number.

The prime factors of 15 are: 3, 5

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No, it's a composite number.15 is NOT a prime number.

3*5 = 15 in prime numbers

15 is a factor of 45, but it is not a prime number.

No, 15 is not a prime number. It is a composite number. A prime number can only be divided by 1 and itself. The number 15 can also be divided by 3 and 5.

2 is a prime number and 15 is a composite number.

3 and 5 are Prime Factors of 15 (3x5=15).

5 is but 15 is not a prime number

Number 17 is but 15 isn't as 5x3 isn't a prime number

3 x 5 = 15, so 15 is not a prime number.

15 is not a prime number, so it can't be a prime factor.

The prime factors of 15 are: 3, 5

15 is a composite number. 11 is a prime number.

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