To determine if 625 is a prime number or a composite number, we simply look at the factors for 625.
If the factors of 625 are only 625 and 1, then we know that 625 is a prime number. Otherwise, 625 is a composite number.
To explain better, if 625 is only divisible by 1 and 625, then it is a prime number, and if 625 is divisible by more than 625 and 1, then it is a composite number.
The factors of 625 are as follows:
1, 5, 25, 125, 625
Therefore, since 625 is divisible by more than one and itself, the answer to the
question "Is 625 prime or composite?" is highlighted in blue below.
composite
Is 626 prime or composite?
OK. Now you know that 625 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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