To determine if 3 is a prime number or a composite number, we simply look at the factors for 3.
If the factors of 3 are only 3 and 1, then we know that 3 is a prime number. Otherwise, 3 is a composite number.
To explain better, if 3 is only divisible by 1 and 3, then it is a prime number, and if 3 is divisible by more than 3 and 1, then it is a composite number.
The factors of 3 are as follows:
1, 3
Therefore, since 3 is divisible by only one and itself, the answer to the
question "Is 3 prime or composite?" is highlighted in blue below.
prime
Is 4 prime or composite?
OK. Now you know that 3 is a prime number. Use our logic above and see if
you can figure out if the next number on our list is prime or composite before you check your answer.
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