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Factors & Multiples

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  • What are the factors of 21?
    1, 3, 7, 21
  • What is the divisibility rule for 5?
    The number must end in 5 or 0.
  • How do I know when a number is a factor of another?
    You can divide the number by it with no remainder
  • Is the number 1 prime or composite?
    neither
  • What are the factors of 5?
    1 and 5
  • _______ x _______ = product
    factor
  • What are the first five multiples of 7?
    7, 14, 21, 28, 35
  • Any even number has which factor?
    2
  • What are the factors of 18?
    1, 2, 3, 6, 9, 18
  • What are the factors of 2?
    1 and 2
  • What are the factors of 12?
    1, 2, 3, 4, 6, 12
  • What are the factors of 81?
    1, 3, 9, 27, 81
  • What are the factors of 7?
    1 and 7
  • A prime number has how many factors?
    2
  • What are the factors of 1?
    1
  • What is the divisibility rule for 3?
    Add the digits. If the sum is a number divisible by 3, 3 is a factor.
  • What are the factors of 36?
    1, 2, 3, 4, 6, 9, 12, 18, and 36
  • If 2 and 3 are factors of a number, so is...
    6
  • What are the factors 16?
    1, 2, 4, 8, 16
  • What are the first five multiples of 6?
    6, 12, 18, 24, 30
  • A composite number has how many factors?
    more than 2
  • What are the factors of 20?
    1, 2, 4, 5, 10, 20
  • What are the factors of 54?
    1, 2, 3, 6, 9, 18, 27, 54
  • What are the factors of 25?
    1, 5, 25