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Factors and Multiples

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  • Is 78 prime or composite?
    composite
  • Rule: Multiply by 3, subtract 1. First term: 2. What are the first 7 terms?
    2, 6, 5, 15, 14, 42, 41
  • Is 30 prime or composite?
    composite
  • Rule: Multiply by 2, add 1. First term: 4. What are the first 5 terms?
    4, 8, 9, 18, 19
  • Is 5 a factor of 26?
    no
  • Is 11 prime or composite?
    prime
  • Is 78 a multiple of 6?
    yes, 6 x 13
  • Is 4 a factor of 24?
    yes 4 x 6
  • Besides 1, what is the least common factor of 9 and 21?
    3
  • Is 17 prime or composite
    prime
  • Rule: Add 7. First term: 12. What are the first 5 terms?
    12, 19, 26, 33, 40
  • What are the first 4 multiples of 8.
    8, 16, 24, 30
  • What is the first common multiple of 3 and 4?
    12
  • What are all of the factors of 36?
    1, 2, 3, 4, 6, 9, 12, 18, 36
  • Is 18 a multiple of 4?
    no
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