To determine if 8400 is a prime number or a composite number, we simply look at the factors for 8400.
If the factors of 8400 are only 8400 and 1, then we know that 8400 is a prime number. Otherwise, 8400 is a composite number.
To explain better, if 8400 is only divisible by 1 and 8400, then it is a prime number, and if 8400 is divisible by more than 8400 and 1, then it is a composite number.
The factors of 8400 are as follows:
1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 25, 28, 30, 35, 40, 42, 48, 50, 56, 60, 70, 75, 80, 84, 100, 105, 112, 120, 140, 150, 168, 175, 200, 210, 240, 280, 300, 336, 350, 400, 420, 525, 560, 600, 700, 840, 1050, 1200, 1400, 1680, 2100, 2800, 4200, 8400
Therefore, since 8400 is divisible by more than one and itself, the answer to the
question "Is 8400 prime or composite?" is highlighted in blue below.
composite
Is 8401 prime or composite?
OK. Now you know that 8400 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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