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Number Theory: Factors, Multiples, LCM & GCF (Grade 5) - Set A

Prime factorisation, factors, multiples, and finding LCM and GCF.

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Math · Grade 5

Number Theory: Factors, Multiples, LCM & GCF

Factorise, list factors and multiples, and find the LCM and GCF.

  1. 1.
    Write the prime factorisation of 66.
  2. 2.
    Write the prime factorisation of 56.
  3. 3.
    Write the prime factorisation of 76.
  4. 4.
    Write the prime factorisation of 48.
  5. 5.
    Write the prime factorisation of 64.
  6. 6.
    List all the factors of 31.
  7. 7.
    List all the factors of 15.
  8. 8.
    List all the factors of 20.
  9. 9.
    List all the factors of 46.
  10. 10.
    List the first 5 multiples of 4.
  11. 11.
    List the first 5 multiples of 11.
  12. 12.
    List the first 5 multiples of 11.
  13. 13.
    Find the GCF (greatest common factor) of 18 and 25.
  14. 14.
    Find the GCF (greatest common factor) of 36 and 18.
  15. 15.
    Find the GCF (greatest common factor) of 13 and 42.
  16. 16.
    Find the GCF (greatest common factor) of 14 and 42.
  17. 17.
    Find the LCM (least common multiple) of 7 and 11.
  18. 18.
    Find the LCM (least common multiple) of 10 and 10.
  19. 19.
    Find the LCM (least common multiple) of 6 and 9.
  20. 20.
    Find the LCM (least common multiple) of 11 and 12.
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