Download Prime and Composite Numbers

Name
Lesson 11.4
Prime and Composite Numbers
Write prime or composite. You may use counters or draw arrays.
1. 12
2. 37
3. 44
4. 28
5. 35
6. 122
7. 61
8. 72
9. 89
10. 56
11. 49
12. 59
13. 101
14. 75
15. 88
16. 14
17. 83
18. 109
19. 36
20. 65
21. 111
PW68
Practice
© Harcourt • Grade 5
MXENL08AWK5X_PHTE_C11_L04.indd PW68
6/15/07 2:25:27 PM
Name
Lesson 11.3
Factors and Greatest Common Factor
Write prime or composite. You may use counters or draw arrays.
2. 19
1, 7, 49
3. 36
1, 19
4. 56
1, 2, 3,
4, 6, 8,
12, 24
1, 2, 4,
7, 8, 14,
28, 56
1, 2, 3,
4, 9, 12,
18, 36
1. 12
5. 24
1
7. 16, 20
8. 13, 26
1, 2, 4
9. 5, 10
1, 13
1, 5
12. 21, 56
12
13. 14, 21
7
7. 61
15. 15, 25
8
5
6. 122
composite
composite
8. 72
prime
Problem Solving and Test Prep
10. 56
USE DATA For 16–17, use the table.
9. 89
prime
composite
11. 49
composite
16. Sharon is dividing her green and blue
12. 59
composite
prime
Sharon’s Rock Collection
rock collection into bags. Each bag
will contain the same number of each
color of rock. How many rocks of each
color will be in each bag?
2 green rocks and 3
blue rocks
Color
Number of Rocks
Red
12
Yellow
28
Green
16
Blue
24
13. 101
prime
17. Sharon also divides her red and yellow rocks into bags. Each bag will contain the same
number of each color of rock. How many bags will Sharon need?
16. 14
14. 75
15. 88
composite
composite
17. 83
composite
4 bags
18. The greatest common factor of 28
composite
1, 2
14. 8, 24
7
3. 44
prime
5. 35
composite
10. 22, 24
Write the greatest common factor for each pair of numbers.
11. 12, 36
2. 37
composite
4. 28
Write the common factors for each pair of numbers.
6. 11, 15
Lesson 11.4
Prime and Composite Numbers
List the factors of each number.
1. 49
Name
18. 109
prime
prime
19. Which number is not a common factor
of 42 and 21?
and another number is 7. The second
number is between 60 and 70. What
is it?
63
B
19. 36
A 7
C
21
6
D
3
B
20. 65
composite
Circled problems are suggested homework problems.
PW67
21. 111
composite
Circled problems are suggested homework problems.
Practice
PW68
© Harcourt • Grade 5
MXENL08AWK5X_PHTE_C11_L03.indd PW67
6/15/07 2:25:00 PM
Practice
© Harcourt • Grade 5
MXENL08AWK5X_PHTE_C11_L04.indd PW68
Lesson 11.3
Item
composite
6/15/07 2:25:27 PM
Lesson 11.4
Suggested rationale
Item
Suggested rationale
1
find the factors of a
composite number
1
composite number with 6
arrays
2
find the factors of a prime
number
2
prime number with 2 arrays
5
find the factors of an even
number
3
composite number with 6
arrays
6
only common factor is 1
5
composite number with 4
arrays
9
common factor is one of the
numbers in the set
7
prime number with 2 arrays
11
GCF is one of the numbers in
the set
8
composite number with 12
arrays
15
GCF is less than each of the
numbers in the set
9
prime number with 2 arrays
16
use the GCF to solve a word
problem
10
composite number with 8
arrays
18
find the factors of a given
number
11
square number with 3 arrays
PW67-PW68
Practice
© Harcourt • Grade 5
MXENL08AWK5X_PHTE_RatA.indd PW68
7/2/07 3:02:12 PM