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No... Every whole number that ends with a 5 includes 5 as a factor (is a multiple of 5).

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its not

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.

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

5 is but 15 is not a prime number

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

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3*5 = 15 in prime numbers

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

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

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

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

5 is but 15 is not a prime number

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

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

The prime factors of 15 are: 3, 5

A number is prime if it has only 1 and itself as factors. For example, 7 is a prime number because it has only 1 and 7 as factors. 15 isn't a prime number because it has 1, 3, 5, and 15 as factors.

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

11 is prime.