To determine if 9905 is a prime number or a composite number, we simply look at the factors for 9905.
If the factors of 9905 are only 9905 and 1, then we know that 9905 is a prime number. Otherwise, 9905 is a composite number.
To explain better, if 9905 is only divisible by 1 and 9905, then it is a prime number, and if 9905 is divisible by more than 9905 and 1, then it is a composite number.
The factors of 9905 are as follows:
1, 5, 7, 35, 283, 1415, 1981, 9905
Therefore, since 9905 is divisible by more than one and itself, the answer to the
question "Is 9905 prime or composite?" is highlighted in blue below.
composite
Is 9906 prime or composite?
OK. Now you know that 9905 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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