Download Prime and Composite Numbers

LESSON 14.3
Name
Prime and Composite Numbers
Vocabulary
1. A
has exactly two factors,
1 and the number itself.
2. A
has more than two factors.
List all the arrays for each number. Write prime or composite for
each number.
3. 8
4. 7
5. 12
1 8, 8 1, 2 4,
1 7, 7 1;
1 12, 12 1, 2 6,
6 2, 3 4, 4 3;
6. 9
7. 6
1 9, 9 1, 3 3;
8. 5
1 6, 6 1, 2 3,
1 5, 5 1;
Write prime or composite for each number.
9. 30
10. 16
11. 24
12. 31
Mixed Review
Find the least common multiple for each set of numbers.
14. 7, 8, 10
42
280
17. The area of Sharon’s garden is
15. 2, 5, 6
16. 3, 4, 7
30
84
18. Beth has $0.60 more than Suzy.
40 sq ft. List all its whole-number
possible lengths and widths.
Together they have $8.20. How
much money does each girl have?
1 40, 40 1, 20 2, 2 20,
Suz has $3.80, Beth has $4.40.
4 10, 10 4, 8 5, 5 8
PW74
Practice
© Harcourt
13. 6, 7, 3
LESSON 14.3
Name
Prime and Composite Numbers
Vocabulary
prime number
1 and the number itself.
1. A
has exactly two factors,
composite number
2. A
has more than two factors.
List all the arrays for each number. Write prime or composite for
each number.
3. 8
4. 7
5. 12
1 8, 8 1, 2 4,
1 7, 7 1;
1 12, 12 1, 2 6,
4 2; composite
prime
6 2, 3 4, 4 3;
composite
6. 9
7. 6
8. 5
1 9, 9 1, 3 3;
1 6, 6 1, 2 3,
1 5, 5 1;
composite
3 2; composite
prime
Write prime or composite for each number.
9. 30
10. 16
composite
11. 24
composite
12. 31
composite
prime
Mixed Review
Find the least common multiple for each set of numbers.
14. 7, 8, 10
42
280
17. The area of Sharon’s garden is
15. 2, 5, 6
16. 3, 4, 7
30
84
18. Beth has $0.60 more than Suzy.
40 sq ft. List all its whole-number
possible lengths and widths.
Together they have $8.20. How
much money does each girl have?
1 40, 40 1, 20 2, 2 20,
Suzy has $3.80, Beth has $4.40.
4 10, 10 4, 8 5, 5 8
PW74
Practice
© Harcourt
13. 6, 7, 3