GCF and LCM

Which pair of numbers has a GCF of 5?

• 10 and 25
• 30 and 40
• 45 and 9
• 50 and 25

Which of these is NOT a factor of 20?

• 2
• 4
• 6
• 20

Tags

CCSS.4.OA.B.4

Prime numbers have:

• Exactly 2 factors
• 2 pairs of factors
• More than 2 factors
• 1 factor

Tags

CCSS.4.OA.B.4

Composite numbers:

• Are always bigger than prime numbers
• Have more than 2 factors
• Have 2 pairs of factors
• Don't have factors

Tags

CCSS.4.OA.B.4

Is 35 prime or composite?

• prime
• composite

Tags

CCSS.4.OA.B.4

What is the least common multiple (LCM) of 4 and 10?

• 4
• 40
• 15
• 20

Find the prime number

• 10
• 9
• 7
• 4

Tags

CCSS.4.OA.B.4

What is the LCM of 2, 4, 6?

• 6
• 12
• 4
• 2

What is the least common multiple (LCM) of 4 and 10?

• 4
• 40
• 15
• 20

Find the Greatest  Common Factor (GCF) of 14 & 22.

• 1
• 2
• 7
• 14