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Math 6 · Unit 2: Numbers and sequences · Cambridge Primary Maths Stage 6

2.3 Common multiples and factors

15 questions · e.g. What is the lowest common multiple of 4 and 6?

Practice

Questions

  1. 1. What is the lowest common multiple of 4 and 6?

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  2. 2. What is the highest common factor of 12 and 18?

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  3. 3. What is the LCM of 3 and 5?

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  4. 4. What is the HCF of 16 and 24?

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  5. 5. Which is a common multiple of 6 and 9?

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  6. 6. Which is a common factor of 20 and 30?

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  7. 7. Buses leave every 10 min and trams every 15 min. Both leave at 9:00. When do they next leave together?

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  8. 8. 24 apples and 36 oranges go into identical bags with no fruit left. What is the most bags?

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  9. 9. What is the LCM of 8 and 12?

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  10. 10. What is the HCF of 7 and 13?

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  11. 11. What is the HCF of 45 and 60?

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  12. 12. What is the LCM of 5 and 10?

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  13. 13. Which are all the common factors of 12 and 16?

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  14. 14. Two lights flash every 4 and 6 seconds. They flash together now. When next?

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  15. 15. What is the LCM of 2, 3 and 4?

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