GCF and LCM and Prime Factorization

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

• 6

• 8

• 48

• 24

What is the GCF of 20 and 30?

• 5

• 2

• 10

• 20

Find the Least Common Multiple (LCM) of 4 & 14.

• 14

• 20

• 28

• 42

What is the GCF of 18 and 24?

• 3

• 6

• 8

• 9

Maya had 16 red flowers and 24 yellow flowers. She wants to make bouquets with the same number of each color flower in each bouquet. What is the greatest number of bouquets that she can make?

• 4

• 2

• 48

• 8

Create a factor tree and find the prime factorization for 80

• 2⁴⋅5

• 4²⋅5

• 2⋅2⋅2

• 8⋅5⋅2

Find the GCF of 64 and 144

• 8

• 6

• 16

• 2

What is the missing factor?

• 1

• 2

• 5

• 8

Tags

CCSS.4.OA.C.5

What are the missing factors?

• 2 and 3

• 3 and 6

• 3 and 3

• 1 and 9

Use a factor tree to find the prime factorisation of 168