To determine if 7155 is a prime number or a composite number, we simply look at the factors for 7155.
If the factors of 7155 are only 7155 and 1, then we know that 7155 is a prime number. Otherwise, 7155 is a composite number.
To explain better, if 7155 is only divisible by 1 and 7155, then it is a prime number, and if 7155 is divisible by more than 7155 and 1, then it is a composite number.
The factors of 7155 are as follows:
1, 3, 5, 9, 15, 27, 45, 53, 135, 159, 265, 477, 795, 1431, 2385, 7155
Therefore, since 7155 is divisible by more than one and itself, the answer to the
question "Is 7155 prime or composite?" is highlighted in blue below.
composite
Is 7156 prime or composite?
OK. Now you know that 7155 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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