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Earn +20 ptsQ: Why are some odd numbers composite?
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What are the 2 odd composite numbers less than 20?
9 and 15 are the only two odd composite numbers less than twenty.
Can a composite number be divided by two?
Even composite numbers can, odd composite numbers can't.
What numbers 19 22 36 and 37 are composite?
The composite numbers in that list are 22 and 36 - you know they are composite, because they are even numbers. The other numbers are odd and prime.
Which composite number is odd and smaller than 20?
15 and 9 are both odd, composite numbers less than 20.
Are composite numbers always even?
No - although all positive even numbers other than 2 are composite, this does not mean that all composite numbers are even - the first odd composite number is 9, which is equal to 3 x 3.
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