# Math Worksheet: Identifying Prime and Composites (1 of 2)

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Write all the factors for the numbers below and circle whether they are prime or composite numbers (the first one is done for you):

 3 1 3 Prime Composite 5 1 5 Prime Composite 9 1 3 9 Prime Composite 14 1 2 7 14 Prime Composite 21 1 3 7 21 Prime Composite 31 1 31 Prime Composite 35 1 5 7 35 Prime Composite 43 1 43 Prime Composite 51 1 3 17 51 Prime Composite 59 1 59 Prime Composite

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## Related Resources

The various resources listed below are aligned to the same standard, (4OA04) taken from the CCSM (Common Core Standards For Mathematics) as the Factors and multiples Worksheet shown above.

Find all factor pairs for a whole number in the range 1 to 100. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number in the range 1 to 100 is a multiple of a given one-digit number. Determine whether a given whole number in the range 1 to 100 is prime or composite.