To determine if 7920 is a prime number or a composite number, we simply look at the factors for 7920.
If the factors of 7920 are only 7920 and 1, then we know that 7920 is a prime number. Otherwise, 7920 is a composite number.
To explain better, if 7920 is only divisible by 1 and 7920, then it is a prime number, and if 7920 is divisible by more than 7920 and 1, then it is a composite number.
The factors of 7920 are as follows:
1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 33, 36, 40, 44, 45, 48, 55, 60, 66, 72, 80, 88, 90, 99, 110, 120, 132, 144, 165, 176, 180, 198, 220, 240, 264, 330, 360, 396, 440, 495, 528, 660, 720, 792, 880, 990, 1320, 1584, 1980, 2640, 3960, 7920
Therefore, since 7920 is divisible by more than one and itself, the answer to the
question "Is 7920 prime or composite?" is highlighted in blue below.
composite
Is 7921 prime or composite?
OK. Now you know that 7920 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.
|
|
