GCF/LCM

GCF or LCM: Which should we find to solve the problem?

Two clocks chimes at the same time. The first clock chimes every 30 minutes. The second clock chimes every 90 minutes. After how many minutes will both clocks chime together again?

• LCM

• GCF

Tags

CCSS.6.NS.B.4

GCF or LCM : Which should we find to solve this problem?

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?

• GCF

• LCM

Tags

CCSS.6.NS.B.4

Find the LCM of the set of numbers. 
8, 12

• 48

• 12

• 4

• 24

Tags

CCSS.6.NS.B.4

Sara had 16 red flowers and 24 yellow flowers.  

She wants to make floral baskets with the same number of each color flower in each basket.  

What is the greatest number of floral baskets that she can make?

• 4
• 2
• 48
• 8

Tags

CCSS.6.NS.B.4

What is the greatest common factor (GCF) of 8 and 24?

• 2

• 4

• 8

• 24

Tags

CCSS.6.NS.B.4

What is the least common multiple (LCM) of 8 and 5?

• 50
• 40
• 5
• 8

Tags

CCSS.6.NS.B.4

GCF of 12 and 18

• 3
• 4
• 6
• 2

Tags

CCSS.6.NS.B.4

Which of the following is a multiple of 7?

• 14

• 17

• 22

Tags

CCSS.4.OA.B.4

GCF or LCM: Which should we find to solve this problem?

Jenny goes to dance class every 6 days and to the library every 18 days. On December 1st she went to dance class and the library. How many days until she does both activities again?

• Greatest Common Factor
• Least Common Multiple

Tags

CCSS.6.NS.B.4

List all the factors of 12

• 1, 2, 3, 4, 6, 12
• 1, 2, 4, 12
• 1, 12
• 1, 2, 3, 4, 5, 6, 12

Tags

CCSS.4.OA.B.4