To determine if 1005 is a prime number or a composite number, we simply look at the factors for 1005.
If the factors of 1005 are only 1005 and 1, then we know that 1005 is a prime number. Otherwise, 1005 is a composite number.
To explain better, if 1005 is only divisible by 1 and 1005, then it is a prime number, and if 1005 is divisible by more than 1005 and 1, then it is a composite number.
The factors of 1005 are as follows:
1, 3, 5, 15, 67, 201, 335, 1005
Therefore, since 1005 is divisible by more than one and itself, the answer to the
question "Is 1005 prime or composite?" is highlighted in blue below.
composite
Is 1006 prime or composite?
OK. Now you know that 1005 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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