To determine if 900 is a prime number or a composite number, we simply look at the factors for 900.
If the factors of 900 are only 900 and 1, then we know that 900 is a prime number. Otherwise, 900 is a composite number.
To explain better, if 900 is only divisible by 1 and 900, then it is a prime number, and if 900 is divisible by more than 900 and 1, then it is a composite number.
The factors of 900 are as follows:
1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 45, 50, 60, 75, 90, 100, 150, 180, 225, 300, 450, 900
Therefore, since 900 is divisible by more than one and itself, the answer to the
question "Is 900 prime or composite?" is highlighted in blue below.
composite
Is 901 prime or composite?
OK. Now you know that 900 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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