Prime and Composite Numbers
Presentation
•
Mathematics
•
4th Grade
•
Medium
Standards-aligned
Cynthia McGee
Used 650+ times
FREE Resource
4 Slides • 16 Questions
1
Prime and Composite
Numbers
2
Factors:
A factor is a number that you
multiply by another number to
get the product.
2x5=10 In this multiplication
problem 2 and 5 are the
factors.
3x4=12 In this multiplication
problem 3 and 4 are the
factors.
Factors are the numbers you
multiply together to get the
product.
3
Multiple Choice
What are factors?
the numbers in a division problem
numbers that are multiplied together to get a product
numbers in an addition problem
numbers in a subtraction problem
4
Multiple Choice
Which numbers are the factors in this problem?
2x9=18
18 and 2
18 and 9
2 and 9
2, 9 and 18
5
Prime Numbers
The numbers
2, 3, 7, 11, 13, 17, 19, 23,
are prime numbers. They
only have two factors…1
and themselves.
They can only be divided
equally by 1 and
themselves.
6
Multiple Choice
What is a prime number?
A number that has only two factors, 1 and itself.
A number that can be divided equally by 1, itself and 2.
A number that is odd.
A number that cannot be divided equally by anything.
7
Multiple Choice
A prime number....
Can be divided by many numbers
Has more than 2 factors
Can only be divided equally by 1 and itself.
is every odd number.
8
Composite Numbers
Composite Numbers can be
divided equally by more numbers
than just 1 and themselves.
Composite numbers have more
than 2 factors.
15 is a composite number
because it can be divided equally
by 1,3,5 and 15.
15 has more than 2 factors, 1, 15,
3, and 5 are all factors of 15.
1x15=15
3x5=15
9
Multiple Choice
What is a composite number?
A number that is odd
A number that has only two factors
A number that can be divided equally by more numbers than just 1 and itself.
A number greater than 2.
10
Multiple Choice
What is a composite number?
A number that has more than 2 factors.
A number that only has 2 factors, 1 and itself.
A number that can only be divided by 1 and itself.
Every odd number
11
Multiple Choice
Is the number 20 prime or composite?
Prime
Composite
12
Multiple Choice
Is the number 8 prime or composite?
prime
composite
13
Multiple Choice
Is the number 19 prime or composite?p
prime
composite
14
Multiple Choice
which of these numbers is prime?
2
4
6
8
15
Multiple Choice
Which of these numbers is prime?
4
8
9
11
16
Multiple Choice
Which of these numbers is composite?
2
11
13
10
17
Multiple Choice
Which of these numbers is composite?
12
5
11
17
18
Multiple Choice
Which number is missing in this list of factors for the number 12?
1, 2, 3, 4, 6
5
9
12
0
19
Multiple Choice
Identify the correct list of factors for the number 8
1, 2, 4, 8
1, 2, 8
2, 4, 8
1,2, 3, 4, 8
20
Multiple Choice
Identify the correct list of factors for the number 13.
1, 13
1, 3, 13
1, 2, 3, 13
1, 3, 12, 13
Prime and Composite
Numbers
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