To determine if 51 is a prime number or a composite number, we simply look at the factors for 51.
If the factors of 51 are only 51 and 1, then we know that 51 is a prime number. Otherwise, 51 is a composite number.
To explain better, if 51 is only divisible by 1 and 51, then it is a prime number, and if 51 is divisible by more than 51 and 1, then it is a composite number.
The factors of 51 are as follows:
1, 3, 17, 51
Therefore, since 51 is divisible by more than one and itself, the answer to the
question "Is 51 prime or composite?" is highlighted in blue below.
composite
Is 52 prime or composite?
OK. Now you know that 51 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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