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By using the divisibility rule for 3, we find that 117 is divisible by 3. That makes it composite.

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Q: How can you use a divisibility rule to determine if117 is prime or composite?

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If a number is divisible by 3 or more numbers than that number is composite, if not than it is prime.

If a number is divisible by anything other than itself and 1, it's composite.

16 is composite.

It is a prime.

Knowing the divisibility rules will help you by being able to recognize if a number has factors (other than one and itself) which are covered by the rules. This will save actually having to start doing divisions.

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If a number is divisible by 3 or more numbers than that number is composite, if not than it is prime.

If a number is divisible by anything other than itself and 1, it's composite.

I can check them for divisibility by prime numbers.

16 is composite.

It is a prime.

It's composite

Knowing the divisibility rules will help you by being able to recognize if a number has factors (other than one and itself) which are covered by the rules. This will save actually having to start doing divisions.

350 is a composite number. it can be divisible by 10, 35, 5, 2 etc. You will find it easier to tell between prime and composite if you know the divisibility rules. one simple one is that if a number ends with zero it is divisible by 10...there are a lot of other divisibility rules.

Yes you canYes. If a number is divisible by anything other than one or itself, it's composite.

10, 25, 50 are the composite factors of the composite number 50. 2 and 5 are prime.

I suggest you try dividing it by different numbers, and see whether it is divisible. If you find a divisor, then it is composite. Otherwise it is a prime. For numbers up to 120, it is sufficient to test divisibility by 2, 3, 5, and 7.

Prime numbers have two factors, composite numbers have more than two.

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