GCF and LCM

What is the least common multiple of 4 and 6?

• 12

• 16

• 24

• 6

What is the least common multiple of 9 and 12?

• 24

• 9

• 36

• 48

What is the greatest common factor of 8 and 12?

• 16

• 4

• 24

• 6

What is the greatest common factor of 10 and 15?

• 20

• 4

• 2

• 5

Bill cut out 6 squares and 8 circles. He divided the cutouts into groups so that the same number of squares and circles were in each group. What is the greatest number of groups he could have made?

• 2

• 3

• 4

Every third visitor to a museum gets a free bumper sticker. Every fifth visitor to that museum gets a free key chain. Which visitor each day will be the first one to get both the bumper sticker and the key chain?

• 3rd

• 5th

• 15th

Gabriella volunteers at the hospital every 4th day. She volunteers at the food pantry every 6th day. She volunteered at the hospital and the food pantry both on March 31. On what date will she next volunteer at both?

• April 12

• April 16

• May 1

Which pair of numbers has a GCF of 6?

• 3 and 18

• 6 and 12

• 12 and 24

Which pair of numbers has a LCM of 20?

• 4 and 5

• 2 and 10

• 5 and 10

What is the LCM of 16 and 24?

• 24
• 48
• 8