Name: _______________________________
Factor pairs
Follow along with the video and take notes.
Area models help determine whether a given whole number in the range 1-100 is
prime or composite. Remember, an area model represents multiplication in rows
and columns.
•
•
Prime numbers only have the factors of 1 and itself.
Composite numbers have multiple factor pairs.
List all factor pairs for the number 10.
Write the factor pairs for the number 7.
Is the number 11 a prime or composite number?
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1054, page 1 of 2
Name: _______________________________
Is the number 16 a prime or composite number?
Practice
Now you try it!
1.
Use an area model to list the factor pairs of 24. Is this number prime or composite?
2.
List the factor pairs of the above chess board.
3.
Does the chess board show a prime or composite number?
4.
harles has a secret number. His number is a composite number with the factors of 1,
C
2, 3, and 6. What whole number is Charles thinking of?
5.
indy has two secret numbers. Her numbers is a prime numbers and they are between
M
the numbers 18 and 25. List Mindy’s two numbers.
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