Prime or composite? | Baamboozle - Baamboozle | The Most Fun Classroom Games!

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Is 38 a prime number? Why

No, 38 is a composite number as 38 is an even number, so besides 1 and itself, 2 is also one of its factors.

Is 45 a prime number? Why?

No, 45 is a composite number as besides 1 and itself, 5 is also one of its factors.

Is 43 a prime number? Why?

Yes, 43 is a prime number as it only has two factors: 1 and itself.

Is 18 a prime number? Why?

No, 18 is a composite number since besides 1 and itself, 2 is also one of its factors.

Are all prime odd numbers?

No, 2 is the only even prime number.

Is 1 a prime number? Why?

1 is NOT a prime number since it only has one factor: itself!

Is 21 a prime number? Why?

No, 21 is a composite number since besides 1 and itself, 3 is also one if its factors.

Is 17 a prime? Why?

Yes, 17 is a prime since it only has two factors: 1 and itself.

Is 13 a prime? Why?

Yes, 13 is a prime since it only has two factors: 1 and itself.

Is 15 a prime? Why?

No, 15 is a composite number since besides 1 and itself, 3 is also one of its factors.

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