To determine if 450 is a prime number or a composite number, we simply look at the factors for 450.
If the factors of 450 are only 450 and 1, then we know that 450 is a prime number. Otherwise, 450 is a composite number.
To explain better, if 450 is only divisible by 1 and 450, then it is a prime number, and if 450 is divisible by more than 450 and 1, then it is a composite number.
The factors of 450 are as follows:
1, 2, 3, 5, 6, 9, 10, 15, 18, 25, 30, 45, 50, 75, 90, 150, 225, 450
Therefore, since 450 is divisible by more than one and itself, the answer to the
question "Is 450 prime or composite?" is highlighted in blue below.
composite
Is 451 prime or composite?
OK. Now you know that 450 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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