Grade 5 Prime & Composite Worksheet (Set A)
Free printable Grade 5 prime & composite worksheet with an answer key, prime and composite numbers. Print as a PDF for the classroom or home.
How to teach prime and composite numbers teaching guide, with a worked explanation.
✓ Answer key checked by math, never wrong
Grade 5 · Math worksheet
Name
Date
Math
Prime or Composite
Write whether each number is prime or composite.
- 1.Is 60 prime or composite?
- 2.Is 27 prime or composite?
- 3.Is 9 prime or composite?
- 4.Is 39 prime or composite?
- 5.Is 15 prime or composite?
- 6.Is 25 prime or composite?
- 7.Is 19 prime or composite?
- 8.Is 38 prime or composite?
- 9.Is 7 prime or composite?
- 10.Is 40 prime or composite?
- 11.Is 10 prime or composite?
- 12.Is 11 prime or composite?
- 13.Is 19 prime or composite?
- 14.Is 20 prime or composite?
- 15.Is 59 prime or composite?
- 16.Is 13 prime or composite?
- 17.Is 13 prime or composite?
- 18.Is 53 prime or composite?
- 19.Is 6 prime or composite?
- 20.Is 30 prime or composite?
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A prime number has exactly two factors (1 and itself); a composite number has more than two.
In class: Test whether a number has exactly two factors (prime) or more (composite) using arrays. Learn that 1 is neither.
This Grade 5 prime & composite set is free to print or save as a PDF, and its answer key is computed in code, so it is never wrong.