To determine if 842 is a prime number or a composite number, we simply look at the factors for 842.
If the factors of 842 are only 842 and 1, then we know that 842 is a prime number. Otherwise, 842 is a composite number.
To explain better, if 842 is only divisible by 1 and 842, then it is a prime number, and if 842 is divisible by more than 842 and 1, then it is a composite number.
The factors of 842 are as follows:
1, 2, 421, 842
Therefore, since 842 is divisible by more than one and itself, the answer to the
question "Is 842 prime or composite?" is highlighted in blue below.
composite
Is 843 prime or composite?
OK. Now you know that 842 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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