Multiples
Factors
Prime vs. Composite Numbers
100
What are multiples?
Multiples are the list of products of a certain number.
-or-
the numbers you say when you are skip counting
100
What are factors?
Factors are numbers multiplied together to get a product.
100
What is a prime number?
A number that has only 2 factors: 1 and itself.
200
Look at the chart. What are all the multiples of 2?
Here are the multiples of 2:
200
What are all the factors of 6?
1, 2, 3, 6
200
What is a composite number?
A number that has 2 or more factors.
300
List the first five multiples of 8.
8, 16, 24, 32, 40
300
What are all the factors of 36?
1, 2, 3, 4, 6, 9, 12, 18, 36
300
Is 5 a prime or composite number? Why?
Prime because the only factor pair is 5 x 1 = 5.
400
Which of the following numbers are multiples of 4?
2, 16, 21, 32, 40
Answers:
16, 32, 40
400
Find the factors of 20.
1 x ___ = 20
2 x ___=20
4 x ___=20
1 x 20 = 20
2 x 10 =20
4 x 5 =20
The factors of 20 are 1, 2, 4, 5, 10, 20.
400
Is 12 a prime or composite number?
Composite because there are multiple factor pairs.
1 x 12 = 12
2 x 6 = 12
3 x 4 = 12
500
Which of the following numbers are multiples of 7?
12, 28, 35, 40, 42
Answers:
28, 35, 42
500
Find the factors of 18.
1 x ___ =18
2 x ___=18
3 x ___=18
1 x 18 =18
2 x 9 = 18
3 x 6 = 18
The factors of 18 are 1, 2, 3, 18, 9, 6.
500
Identify the composite numbers in the list:
9, 17, 23, 48
Composite Numbers : 9 and 48
600
List the first 5 multiples of 12.
12, 24, 36, 48, 60
600
What are all the factors of 20?
1 x 20 = 20
2 x 10 = 20
4 x 5 = 20
600
Identify the prime numbers in the list:
3, 5, 8, 10, 11, 13, 15
Prime Numbers: 3, 5, 11, 13