Finding GCF and LCM

What is the least common multiple of 15 and 45?

• 5

• 15

• 45

• 90

Tags

CCSS.6.NS.B.4

The greatest common factor of 40 and a number is 4. Which of these could be the other number? Choose all the correct answers.

• 4

• 10

• 12

• 80

Tags

CCSS.4.OA.B.4

Mr. Pinello has 80 colored pencils and 64 markers to divide into containers for his class. He wants each container to have the same number of items. What is the greatest number of containers Mr. Pinello can make if he wants each container to have the same number of colored pencils and the same number of markers? Show your work.

• 144

• 4

• 16

• 64

Tags

CCSS.6.NS.B.4

 $\frac{12}{20}=\frac{12}{20}\div\frac{x}{x}=\frac{3}{5}$  

To reduce a fraction you need to find the GCF of both the numerator and the denominator.  What GCF makes this statement true?

• GCF = 6

• GCF = 60

• GCF = 2

• GCF = 4

Tags

CCSS.6.NS.B.4

The greatest common factor or 8 and 12 is 8.

• True

• False

Tags

CCSS.6.NS.B.4

A common multiple of 8 and 12 is 96.

• True

• False

Tags

CCSS.6.NS.B.4

The least common multiple of 8 and 12 is 48.

• True

• False

Tags

CCSS.6.NS.B.4

A common factor of 8 and 12 is 4.

• True

• False

Tags

CCSS.6.NS.B.4