185 is composite because anything that has 5 in the ones place is always divisible by 5.
A Prime number is a number that can only divided equally by itself and 1, so since 185 is divisible by 185, 1, 5, and 37, it is not a prime number.
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It is a composite number because a prime number would be divisible by 1 and itself but right off the bat you can see 185 is divisible by 5
4, composite. 67, prime.
Prime
1 is special 2 prime 3 prime 4 composite 5 prime 6 composite 7 prime 8 composite 9 composite 10 composite 11 prime 12 composite ext.
5 prime, 25 composite.