To determine if 63 is a prime number or a composite number, we simply look at the factors for 63.
If the factors of 63 are only 63 and 1, then we know that 63 is a prime number. Otherwise, 63 is a composite number.
To explain better, if 63 is only divisible by 1 and 63, then it is a prime number, and if 63 is divisible by more than 63 and 1, then it is a composite number.
The factors of 63 are as follows:
1, 3, 7, 9, 21, 63
Therefore, since 63 is divisible by more than one and itself, the answer to the
question "Is 63 prime or composite?" is highlighted in blue below.
composite
Is 64 prime or composite?
OK. Now you know that 63 is a composite 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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