Is a multiple of the prime number 3 also a prime number?

2 Answers
Feb 20, 2017

No

Explanation:

A multiple of the prime number 3 is not also a prime number because since it is a multiple, it is something like 3×n for any number n. For example, 6 is a multiple of 3 and it is composite, not prime. Also, 9 is 3×3 and it is not prime.

Feb 20, 2017

Only 1×3=3 itself.

Explanation:

A prime number is a number whose only whole factors are 1 and itself.

The only positive integral multiple of 3 which is a prime number is 1×3=3 itself.

Any larger multiple is composite since it will be a multiple of 3 and another whole number larger than 1.