Prime and Composite Numbers Worksheet (Free Printable)
A free printable prime or composite worksheet with 30 questions and an answer key, for Year 5 and Year 6. Print it, make a new set of questions, or practise online with Factors, Multiples & Primes.
Prime or compositeName: ____________________Date: ____________Score: ____ / 30
Write prime or composite next to each number.
- 70 →
- 2 →
- 75 →
- 26 →
- 74 →
- 37 →
- 5 →
- 95 →
- 78 →
- 47 →
- 88 →
- 43 →
- 79 →
- 68 →
- 13 →
- 50 →
- 69 →
- 85 →
- 66 →
- 19 →
- 64 →
- 25 →
- 3 →
- 7 →
- 60 →
- 91 →
- 51 →
- 32 →
- 86 →
- 53 →
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Tip
A prime number has exactly two factors: 1 and itself (2, 3, 5, 7, 11…). A composite number has more. 1 is neither. Test by dividing by 2, 3, 5 and 7: if none of them work (and the number is under 121), it is prime.