To determine if 215 is a prime number or a composite number, we simply look at the factors for 215.
If the factors of 215 are only 215 and 1, then we know that 215 is a prime number. Otherwise, 215 is a composite number.
To explain better, if 215 is only divisible by 1 and 215, then it is a prime number, and if 215 is divisible by more than 215 and 1, then it is a composite number.
The factors of 215 are as follows:
1, 5, 43, 215
Therefore, since 215 is divisible by more than one and itself, the answer to the
question "Is 215 prime or composite?" is highlighted in blue below.
composite
Is 216 prime or composite?
OK. Now you know that 215 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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