To determine if 9855 is a prime number or a composite number, we simply look at the factors for 9855.
If the factors of 9855 are only 9855 and 1, then we know that 9855 is a prime number. Otherwise, 9855 is a composite number.
To explain better, if 9855 is only divisible by 1 and 9855, then it is a prime number, and if 9855 is divisible by more than 9855 and 1, then it is a composite number.
The factors of 9855 are as follows:
1, 3, 5, 9, 15, 27, 45, 73, 135, 219, 365, 657, 1095, 1971, 3285, 9855
Therefore, since 9855 is divisible by more than one and itself, the answer to the
question "Is 9855 prime or composite?" is highlighted in blue below.
composite
Is 9856 prime or composite?
OK. Now you know that 9855 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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