Lesson 18 LCM and GCF Quiz_Retake

What is the result of 40 + 80?

• 10(4 + 8)

• 5(16 + 24)

• 10(12 + 8)

• 20(2 + 6)

Which pair of numbers results in the highest least common multiple (LCM)?

• 3 and 9

• 2 and 5

• 7 and 8

• 10 and 15

Which equation shows how to rewrite the sum of 36 and 48

using their greatest common factor?

• 36 + 48 = 6(6 + 8)

• 36 + 48 = 12(3 + 4)

• 36 + 48 = 4(9 + 12)

• 36 + 48 = 84(1)

What is the least common multiple of 8 and 4?

• 8

• 16

• 32

• 4

What is the greatest common factor for 81 and 54?

• 3

• 9

• 27

• 6

Hot dog sausages come in packs of 8 and hot dog buns come in packs of 10. What is the LEAST number of hot dog sausage and bun packages you can buy so there is one sausage for each bun and none are left over?

Enter each response on its own line:

_______________Hot dog sausage packages and ______________ Hot dog bun packages

(a)  

What is the greatest common factor of 36 and 60?

• 6

• 12

• 18

• 3

Find the LCM of 9, 12, and 15.

• 45

• 180

• 60

• 90

A farm has 15 apple trees and 45 orange trees. How many trees can be arranged in rows with an equal number of trees in each row?

• 5

• 15

• 10

• 3

Find the prime factorization of 48 and calculate its LCM.

• 48

• 24

• 12

• 16