To determine if 1089 is a prime number or a composite number, we simply look at the factors for 1089.
If the factors of 1089 are only 1089 and 1, then we know that 1089 is a prime number. Otherwise, 1089 is a composite number.
To explain better, if 1089 is only divisible by 1 and 1089, then it is a prime number, and if 1089 is divisible by more than 1089 and 1, then it is a composite number.
The factors of 1089 are as follows:
1, 3, 9, 11, 33, 99, 121, 363, 1089
Therefore, since 1089 is divisible by more than one and itself, the answer to the
question "Is 1089 prime or composite?" is highlighted in blue below.
composite
Is 1090 prime or composite?
OK. Now you know that 1089 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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