To determine if 905 is a prime number or a composite number, we simply look at the factors for 905.
If the factors of 905 are only 905 and 1, then we know that 905 is a prime number. Otherwise, 905 is a composite number.
To explain better, if 905 is only divisible by 1 and 905, then it is a prime number, and if 905 is divisible by more than 905 and 1, then it is a composite number.
The factors of 905 are as follows:
1, 5, 181, 905
Therefore, since 905 is divisible by more than one and itself, the answer to the
question "Is 905 prime or composite?" is highlighted in blue below.
composite
Is 906 prime or composite?
OK. Now you know that 905 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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