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- Prime Numbes & Factors
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- 1) Which of these numbers are prime ?
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- 21 23 25 27 29
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- 2) What are the next two prime numbers after 3O ?
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- 3) Express the following numbers as prime factors:
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- 1. 48 4. 60 7. 70 10. 100
- 2. 99 5. 180 8. 96
- 3. 52 6. 24 9. 64
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- 4) From the numbers 8, 12, 16, 19, 20
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- a) Which number is a prime number?
- b) Which number is a square number?
- c) Which is a multiple of 5?
- d) Which is a factor of 84?
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- 5) Which of these numbers are prime ?
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- 18, 19, 20, 23,25, 27
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- Which are square numbers?
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- 6) Express 1728 in prime factors.
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