Identifying The GCF

GCF stands for...

• great calculator festival
• giant circumference fact
• grouped calculation finder
• greatest common factor

What is the GCF of 4 and 12?

• 3
• 1
• 6
• 4

What is the GCF of 18 and 24?

• 3
• 6
• 8
• 9

What is the GCF of 20 and 30?

• 5
• 2
• 10
• 20

Find the GCF of 64 and 144

• 8
• 6
• 16
• 2

What is the greatest factor of 28 and 49?

• 1
• 2
• 7
• 12

What is the GCF of 20, 44, and 88?

• 4
• 2
• 22
• 1

Which pair of numbers has a GCF of 1?

• 51 and 17
• 20 and 9 
• 24 and 27
• 14 and 44

What is the greatest common factor of 8x² and 4x?

• 8x²

• 4x²

• 2x

• 4x

What is the GCF of 18k and 15k³

• 3k²
• 3k³
• 3k
• 5k