GCF/LCM Review

What are the least common multiple and the greatest common factor of the number 9 and 6?

• greatest common factor: 36, least common multiple: 3

• greatest common factor: 6, least common multiple: 18

• greatest common factor: 3, least common multiple: 36

• greatest common factor: 3, least common multiple: 18

Tags

6.NS.4a

6.NS.4b

Four students find the sum of 72 and 56 shown in the table. 

Which student uses the greatest common factor of 72 and 56 to find their sum?

• Student 1

• Student 2

• Student 3

• Student 4

What is the prime factorization of 100?

What is the prime factorization of 81?

What is the greatest common factor of 21, 35 and 63?

• 1

• 3

• 7

• 9

A planner assembles party favor bags filled with glow sticks and tattoos. There are 24 glow sticks and 30 tattoos to divide evenly among the bags. If there are no leftover items, what is the greatest number of bags the planner can assemble?

• 6 bags

• 8 bags

• 24 bags

• 30 bags

Tags

CCSS.6.NS.B.4

The 6th grade science teacher gives a test every 12 days. The 6th grade math teacher gives a test every 9 days. Today, both the science and math teacher are giving tests. In how many days will the science and math teachers both give tests on the same day again?

• 18 days

• 24 days

• 27 days

• 36 days

Tags

CCSS.6.NS.B.4

Two numbers are given, 64 and 100. Find GCF.

Which expression represents the sum of 42 and 36?

• 2 (21 + 12)

• 3 (14 + 6)

• 6 (7 + 6)

• 9 (5 + 4)

Which pairs of numbers have a greatest common factor of 6?

SELECT ALL THAT APPLY

• 18 and 66

• 48 and 72

• 36 and 54

• 18 and 24

Tags

CCSS.6.NS.B.4