To determine if 9090 is a prime number or a composite number, we simply look at the factors for 9090.
If the factors of 9090 are only 9090 and 1, then we know that 9090 is a prime number. Otherwise, 9090 is a composite number.
To explain better, if 9090 is only divisible by 1 and 9090, then it is a prime number, and if 9090 is divisible by more than 9090 and 1, then it is a composite number.
The factors of 9090 are as follows:
1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 101, 202, 303, 505, 606, 909, 1010, 1515, 1818, 3030, 4545, 9090
Therefore, since 9090 is divisible by more than one and itself, the answer to the
question "Is 9090 prime or composite?" is highlighted in blue below.
composite
Is 9091 prime or composite?
OK. Now you know that 9090 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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