Greatest Common Factor & Least Common Multiple Halloween Riddle - Free Printable

Educational worksheet: Greatest Common Factor & Least Common Multiple Halloween Riddle. Download and print for classroom or home learning activities.

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1. 2: 1, 2
4: 1, 2, 4
GCF: 2

2. 5: 1, 5
10: 1, 2, 5, 10
GCF: 5

3. 10: 1, 2, 5, 10
15: 1, 3, 5, 15
GCF: 5

4. 13: 1, 13
15: 1, 3, 5, 15
GCF: 1

5. 12: 1, 2, 3, 4, 6, 12
14: 1, 2, 7, 14
GCF: 2

6. 14: 1, 2, 7, 14
7: 1, 7
GCF: 7

7. 3: 1, 3
15: 1, 3, 5, 15
GCF: 3

8. 3: 1, 3
18: 1, 2, 3, 6, 9, 18
GCF: 3

9. 5: 1, 5
15: 1, 3, 5, 15
GCF: 5

10. 18: 1, 2, 3, 6, 9, 18
15: 1, 3, 5, 15
GCF: 3

11. 12: 1, 2, 3, 4, 6, 12
15: 1, 3, 5, 15
GCF: 3

12. 12: 1, 2, 3, 4, 6, 12
14: 1, 2, 7, 14
GCF: 2

13. 14: 1, 2, 7, 14
2: 1, 2
GCF: 2

14. 20: 1, 2, 4, 5, 10, 20
15: 1, 3, 5, 15
GCF: 5

Parent Tip: Review the logic above to help your child master the concept of least common multiple and greatest common factor worksheets.

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