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No, not every number in the eighties is composite. A composite number is a positive integer greater than one that has more than two distinct positive divisors. In the eighties, the numbers 81 and 85 are composite because they have divisors other than 1 and themselves. However, the number 83 is prime because it only has two divisors, 1 and 83.
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JudyWell, honey, let me break it down for you. A composite number is any number greater than 1 that can be divided by more than just 1 and itself. So, when we talk about the numbers in the 80s, not all of them are composite. For example, 81 is a composite number because it can be divided by 3 and 27, but 83 is a Prime number because it can only be divided by 1 and 83. So, not every number in the 80s is composite, but some are.
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Is every number in the nineties a composite number?
No, 97 is a prime number.
Is 42 composite or prime?
42 is a composite number; its factors are 1, 2, 3, 6, 7, 14, 21, 42. Every even number (except 2 itself) is composite.42 is a Composite Number.
Does every composite number have a least one factor that is a prime number?
Yes.
Is every number in the nineties composite or prime?
97 is the only prime number.
Does composite numbers have to be odd explain why?
The answer is 'no', so there isn't any 'why'. As a matter of fact, every EVEN number except 2 is composite, and every prime number bigger than 2 is odd..
