To determine if 987 is a prime number or a composite number, we simply look at the factors for 987.
If the factors of 987 are only 987 and 1, then we know that 987 is a prime number. Otherwise, 987 is a composite number.
To explain better, if 987 is only divisible by 1 and 987, then it is a prime number, and if 987 is divisible by more than 987 and 1, then it is a composite number.
The factors of 987 are as follows:
1, 3, 7, 21, 47, 141, 329, 987
Therefore, since 987 is divisible by more than one and itself, the answer to the
question "Is 987 prime or composite?" is highlighted in blue below.
composite
Is 988 prime or composite?
OK. Now you know that 987 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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