Factors of Composite Numbers
This lesson is on factors of composite numbers. Students will write the factors of different numbers.
First, you will copy the worksheet I have included in this lesson. Then, you will explain what a factor is and show the students factors of a composite number before they do the worksheet.
A composite number has more than two factors.
Example: 18 is a composite number.
1 x 18 = 18
3 x 6 = 18
The factors of 18 = 1, 3, 6, and 18.
After you have gone over some examples of factors of composite numbers, then you can pass out the worksheet.
Worksheet: Factors of Composite Numbers.
Directions: Write the factors of each composite number.
1. 16 =
2. 24 =
3. 35 =
4. 42 =
5. 50 =
6. 100 =
7. 63 =
8. 45 =
9. 22 =
10. 21 =
11. 12 =
12. 32 =
13. 8 =
14. 54 =
15. 48 =
16. 72 =
17. 81 =
18. 36 =
19. 75 =
20. 49 =
Answers to Worksheet
1. 16 = 1, 2, 4, 8, 16
2. 24 = 1, 2, 4, 6, 12, 24
3. 35 = 1, 5, 7, 35
4. 42 = 1, 2, 6, 7, 21, 42
5. 50 = 1, 2, 25, 50
6. 100 = 1, 2, 4, 5, 10, 20, 25, 50, 100
7. 63 = 1, 7, 9, 63
8. 45 = 1, 5, 9, 45
9. 22 = 1, 11, 22
10. 21 = 1, 3, 7, 21
11. 12 = 1, 2, 3, 4, 6, 12
12. 32 = 1, 2, 4, 8, 16, 32
13. 8 = 1, 2, 4, 8
14. 54 = 1, 2, 6. 9, 27, 54
15. 48 = 1, 2, 3, 6, 8, 16, 24, 48
16. 72 = 1, 2, 8, 9, 36, 72
17. 81 = 1, 9, 81
18. 36 = 1, 2, 3, 4, 6, 9, 12, 18, 36
19. 75 = 1, 3, 5, 15, 25, 75
20. 49 = 1, 7, 49
Each question is worth five points.
100 to 90 = A
89 to 80 = B
79 to 70 = C
69 to 60 = D
Below 60 = F
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