List the multiples of 72.
What is 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
Which number is a factor of 21, but not a multiple of 7?
4, 2, 5, or 3
What is 3. *Think: the only number in the list that can be multiplied to get to 21 is 3. None of the numbers are multiples of 7.
List the first 11 multiples of 7.
What is 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77. *Think: when coming up with multiples of numbers, you can either skip-count by that number OR think of the multiplication facts for that number. MULTIPLE=MULTIPLY
Which number is a factor of 20, but not a multiple of 2?
5, 10, 4, or 12
What is 5. *Think: 5, 10, and 4 are all factors of 20 because they can be multiplied by another number to get to 20. 4 and 10 are multiples of 2 because you can skip-count by 2's and get to each of them.
List the factors for 18.
What is 1, 2, 3, 6, 9, 18