To determine if 630 is a prime number or a composite number, we simply look at the factors for 630.
If the factors of 630 are only 630 and 1, then we know that 630 is a prime number. Otherwise, 630 is a composite number.
To explain better, if 630 is only divisible by 1 and 630, then it is a prime number, and if 630 is divisible by more than 630 and 1, then it is a composite number.
The factors of 630 are as follows:
1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 30, 35, 42, 45, 63, 70, 90, 105, 126, 210, 315, 630
Therefore, since 630 is divisible by more than one and itself, the answer to the
question "Is 630 prime or composite?" is highlighted in blue below.
composite
Is 631 prime or composite?
OK. Now you know that 630 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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