Multiples
List the first four multiples of 5.
5, 10, 15, 20
Find the factor pairs for 12
1 and 12
2 and 6
3 and 4
14
composite
Which numbers are common multiples of 3 and 5?
5, 9, 15, or, 45
15 and 45
x x x x x
x x x x x
Find all the factors for the number represented by the array.
1,2,5,10
Which numbers are multiples of 4?
8, 14, 16, 18, 56
8, 16, 56
Find the factor pairs for 16
1 and 16, 2 and 8, 4 and 4
17
prime
List the first ten multiples of 2 and 3. List the first three common multiples.
2: 2,4,6,8,10,12,14,16,18,20
3: 3,6,9,12,15,18,21,24,27,30
CM: 6, 12, 18
List all of the factors of 54.
1,2,3,6,9,18,27,54
Find the first 7 multiples of 6
6, 12, 18, 24, 30, 36, 42
Write all the factors for 19
1,19
25
composite
Can you find a common multiple of three numbers by multiplying the three numbers? Explain.
Yes, multiplying the three numbers gives a product that is a multiple of all three numbers.
yes, Since 4 times 5 is 20, 20 is a multiple of 4
Are all multiples of 4 multiples of 8? Explain.
No, 12 is a multiple of 4, but not of 8.
Write all the factors for 21
1,3,7,21
37
prime
A number has 6 as a factor. What other factors must the number have?
1,2, and 3
The number 3,5, and 7 are odd and prime. The number 9 is odd. Does this mean 9 is prime? Explain your reasoning.
No, 9 has a factor pair 3 and 3, so it is not prime.