GCF, LCM, Prime Factorization
  • 1. What is the GCF of 8, 12, and 30?
A) 2
B) 4
C) 6
D) 1
  • 2. What is the GCF of 18 and 72?
A) 18
B) 72
C) 2
D) 1
  • 3. What is the GCF of 20 and 320?
A) 1
B) 20
C) 10
D) 5
  • 4. What is the GCF of 4, 5, and 9?
A) 1
B) 9
C) 180
D) 2
  • 5. What is the LCM of 7 and 11?
A) 77
B) 11
C) 7
D) 18
  • 6. What is the LCM of 8 and 24?
A) 48
B) 24
C) 8
D) 172
  • 7. What is the LCM of 2, 4, and 10?
A) 40
B) 20
C) 80
D) 160
  • 8. What is the LCM of 6, 9, and 12?
A) 3
B) 72
C) 36
D) 54
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