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Prime and Composite Numbers Worksheets - 15 Worksheets Library - Free Printable

Educational worksheet: Prime and Composite Numbers Worksheets - 15 Worksheets Library. Download and print for classroom or home learning activities.

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Final Answer:
1) Factors: 1, 43 → Prime
2) Factors: 1, 3, 5, 9, 15, 45 → Composite
3) Factors: 1, 47 → Prime
4) Factors: 1, 53 → Prime
5) Factors: 1, 5, 11, 55 → Composite

Prime numbers in the box: 23, 31, 47, 23 (again), 73, 71, 89
(Note: 23 appears twice — count once. So unique primes: 23, 31, 47, 73, 71, 89)
Also check: 12 is not prime, 56, 51, 55, 76, 80, 95 are composite.
So circled numbers: 23, 31, 47, 73, 71, 89

Parent Tip: Review the logic above to help your child master the concept of worksheet prime composite versus.

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