To determine if 7120 is a prime number or a composite number, we simply look at the factors for 7120.
If the factors of 7120 are only 7120 and 1, then we know that 7120 is a prime number. Otherwise, 7120 is a composite number.
To explain better, if 7120 is only divisible by 1 and 7120, then it is a prime number, and if 7120 is divisible by more than 7120 and 1, then it is a composite number.
The factors of 7120 are as follows:
1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3560, 7120
Therefore, since 7120 is divisible by more than one and itself, the answer to the
question "Is 7120 prime or composite?" is highlighted in blue below.
composite
Is 7121 prime or composite?
OK. Now you know that 7120 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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