GCF, LCM, Prime Factorization

GCF of 8 and 20

• 8
• 2
• 4
• 10

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

• 6
• 8
• 48
• 24

Create a factor tree and find the prime factorization for 80

• 2⁴⋅5

• 4²⋅5

• 2⋅2⋅2

• 8⋅5⋅2

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

Use a number tree to find the prime factorization of 48

• 4x2x6
• 4x2²x3
• 3x2⁴
• 12x4

Tags

CCSS.4.OA.B.4

Extension Question!!!!

A radio station is giving away a $100 bill to every 30th caller and movie tickets to every 40th caller. Which caller will be the first to win both prizes?

• 5

• 2

• 10

• 120

Extension Question!!!!

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

What would be the EXPANDED prime factorization of number 36?

• 2² x 3²

• 6 x 6

• 2 x 2 x 3 x 3

• 2 x 3 x 3 x 3