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No number that is a multiple of 3, can be a Prime number.

A prime number must only be divisible by itself and 1. It cannot be divisible by any other number.

Therefore if it is a multiple of 3, then it must be divisible by 3 and hence, not a prime number.

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Q: What number is both a prime number and a multiple of 3?

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Of course. There is 3. Remember, multiples of 3 can also be divided by 3, so the only prime number that is a multiple of 3 is 3.

Yes, 3 is a prime number. Any other multiple of 3 can't, because the only factors of a prime number are 1 and the number.

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3 Example: 1,3

A prime multiple is when a number is expressed as the product of its prime factors as for example: 2*3*5*7 = 210

One two digit number that is not prime and is not a multiple of 2, 3, or 5 is 49. Another such number is 91.

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