Factors, Prime/Composite, GCF/LCM

What is the least common multiple (LCM) of 5 and 20?

• 4
• 5
• 20
• 100

What is the least common multiple (LCM) of 6 and 8?

• 6
• 8
• 48
• 24

What is the least common multiple (LCM) of 4, 6, and 18?

• 2

• 6

• 24

• 36

GCF (Greatest Common Factor) of 24 and 36

• 8
• 6
• 12
• 4

GCF (Greatest Common Factor) of 32 and 8

• 16

• 4
• 32

• 8

GCF (Greatest Common Factor) of 10, 4, and 15

• 2

• 1

• 5

• 60

Use a number tree to find the prime factorization of 32

• 2x2x2x4
• 2x2x2x2x2
• 4x4x2
• 2x2x2x2x1

Tags

CCSS.4.OA.B.4

Use a number tree to find the prime factorization of 42

• 4x4x3
• 6x7
• 7x3x2
• 5x4x2

Tags

CCSS.4.OA.B.4

Select all of the prime numbers.

• 0

• 19

• 31

• 47

• 51

Tags

CCSS.4.OA.B.4

If two numbers do not share any common factors, they are considered to be _____________________________.

• Prime

• Half Prime

• Relatively Prime

• Sorta Prime