1. Is 3 a factor of 27? How do you know?
    2. Is 7 a factor of 32? How do you know?
  1. List 5 multiples of 4.
    1. Is 35 a multiple of 7? How do you know?
    2. Is 42 a multiple of 8? How do you know?
  2. List all the factors of:
    1. 6
    2. 15
    3. 25
    4. 26
  3. Which of the following are prime numbers? How do you know?
    1. 39
    2. 51
    3. 67
  4. Challenge question: Find all the prime numbers between 25 and 50. Explain what you did to find your answer.
    1. Draw a number line like the one below. Mark the numbers that have 6 as a factor on this number line.
    2. With a pencil of a different color, mark the numbers that have 3 as a factor.
    3. Compare the multiples. What do you notice?