Definitions
A number that has exactly two factors: 1 and itself.
A prime number.
ex. 1 x 29
Factor or multiple:
2 is a _____ of 8
Factor
2 x 4 = 8
Identify the factor pairs of 3.
1x3
Identify if the number is prime or composite:
6
Composite--> more than 2 factors
1 x 6 , 2 x 3
A teacher has 24 pencils. She wants to put the same number of pencils in each group with no pencils left over.
What are all the possible numbers of groups she can make?
1, 2, 3, 4, 6, 8, 12, or 24 groups.
A number that has more than two factors.
Composite number
ex. 21 --> 1 x 21 & 3 x 7
Factor or multiple:
15 is a _____ of 5
Multiple
3 x 5 = 15
Identify the factor pairs of 17.
1 x 17
Identify if the number is prime or composite:
9
Composite--> more than 2 factors
1 x 9 , 3 x 3
A school has 36 students going on a field trip. The teacher wants to put students into equal-sized groups.
What are four different group sizes she could use?
A number that is the result of multiplying a given number by a whole number.
ex. 9 and 27 are multiples of 3
Factor or multiple:
6 is a _____ of 24
6 x 4 = 24
Identify the factor pairs of 18.
1 x 12 , 2 x 9 , 3 x 6
Identify if the number is prime or composite:
21
1 x 21 , 3 x 7
Maya has 24 tiles. She wants to arrange all of them into equal rows with no tiles left over.
Name all possible numbers of rows she could make.
1, 2, 3, 4, 6, 8, 12, or 24 rows
A number that can be multiplied by another whole number to get a product.
Factor
ex. 4 and 5 are factors of 20--> 4 x 5 = 20
Which is true:
10 is a multiple of 60
60 is a multiple of 10
60 is a multiple of 10
Identify the factor pairs of 30.
1 x 30 , 2 x 15 , 3 x 10 , 5 x 6
Identify if the number is prime or composite:
29
1 x 29
Ella has 18 students in her class. Sam has 24 students in his class.
List all the common factors of the number of students in Ella and Sam's classes.
1 , 2 , 3 , and 6.
A number that is shared as a factor by two or more numbers.
Common factor
ex: 6 is a common factor of 18 and 24
Which is true:
5 is a factor of 40
40 is a factor of 5
5 is a factor of 40
Identify the factor pairs of 48.
1 x 48 , 2 x 24 , 3 x 16 , 4 x 12 , 6 x 8
Identify if the number is prime or composite:
2
Prime --> only 2 factors
1 x 2
Sam's class has 24 students. Some of the students in Sam's class are working on a project. The number of students working on the project is a multiple of 3 and a multiple of 4.
How many students are working on the project?
12
3: 3, 6, 9, 12, 15, 18, 21, 24
4: 4, 8, 12, 16, 20, 24