Definitions
What is a prime number?
A prime number is a number that ONLY has two factors.
List the first five multiples of 9?
9 18 27 36 45
What are the factor pairs of 27?
1 x 27 and 9 x 3
Is 21 prime or composite?
composite
1 x 21
7 x 3
The school needs 45 seats. They have tables that seat 9 and tables that seat 10. They do not want to have extra seats. How many tables do they need?
They need 5 tables that each have 9 seats.
What is a factor?
A factor is one number that makes up a product. For example: 3 x 3 = 9. The factor is 3
Is 40 a multiple of 8?
Yes because 8 x 5 = 40
What are the factor pairs of 24?
1 x 24
2 x 12
Is 36 prime or composite?
Composite
1 x 36, 2 x 18, 3 x 12, 4 x 9, 6 x 6
If I have 50 cards, can I equally split them between 3 people?
No, you can not because 50 is not a multiple of 3.
What is a composite number?
A composite number is a number with MORE than two factor pairs.
Is 7 a multiple of 27? Why or why not?
No because when skip counting by 7, you never say 27
What are the factor pairs of 30?
1 x 30
2 x 15
3 x 10
6 x 5
Is 11 prime or composite?
Prime
1 x 11
Find all the factor pairs of 100
1 x 100
2 x 50
4 x 25
5 x 20
10 x 10
What is a multiple?
A multiple is the result of multiplying two factors. Example: 3 x 3 = 9. The multiple is 9.
List the first ten multiples of 6
6 12 18 24 30 36 42 48 54 60
What are the factor pairs of 28?
1 x 28
2 x 14
4 x 7
Is 45 prime or composite?
Composite
1 x 45 and 9 x 5
List all the multiples of 8
8 16 24 32 40 48 56 64 72 80
4 x 5 = 20, what is the 20? factor or multiple?
4 x 5 = 20, what is the 5? factor or multiple?
multiple
factor
If I have 50 cards, can I split them equally between 5 people? Why or why not?
Yes, you can because 50 is a multiple of 5. I know this because 5 x 10 = 50.
What are the factor pairs of 36?
1 x 36
2 x 18
3 x 12
4 x 9
6 x 6
Is 29 prime or composite?
Prime
1 x 29
Is 75 prime or composite?
Composite - 1 x 75, 2 x 25, 5 x 15