Practice on Tuesday LCM and GCF

Two neon signs are turned on at the same time. Both signs blink as they are turned on. One sign blinks every 9 seconds. The other sign blinks every 15 seconds. In how many seconds will they blink together again?

• 48 seconds
• 45 seconds
• 16 seconds
• 8 seconds

Tags

CCSS.6.NS.B.4

The school cafeteria serves tacos every sixth day and cheeseburgers every eight day. If tacos and cheeseburgers are both on today’s menu, how many days will it be before they are both on the menu again?

• 14 days
• 24 days
• 34 days
• 44 days

Tags

CCSS.6.NS.B.4

Two clocks are turned on at the same time. One clock chimes every 15 minutes. The other clock chimes every 25 minutes. In how many minutes will they chime together?

• 55 minutes
• 25 minutes
• 60 minutes
• 75 minutes

Tags

CCSS.6.NS.B.4

Henry and Margo both began traveling around a circular track. Henry is riding his bike, and Margo is walking. It takes Henry 7 minutes to make it all the way around, and Margo takes 12 minutes. How much time will pass until they meet at the starting line?

• 84 minutes
• 48 minutes
• 854 minutes
• 78 minutes

Tags

CCSS.6.NS.B.4

Jenny goes to dance class every 6 days, karate class every 12 days, and to the library every 18 days. On December 1st she went to both classes and the library. On what date will she do both classes and go to the library?

• 24 days
• 36 days
• 42 days
• 52 days

Tags

CCSS.6.NS.B.4

Peter has 18 oranges, 27 pears and 12 bananas. He wants to make fruit baskets with the same number of each fruit in each basket. What is the greatest number of fruit baskets he can make?

• 1
• 2
• 3
• 4

Tags

CCSS.6.NS.B.4

Is this question asking to find GCF or LCM?

• GCF
• LCM

Tags

CCSS.6.NS.B.4

Is this question asking to find GCF or LCM?

• GCF
• LCM

Tags

CCSS.6.NS.B.4

 Find the GCF of each set of numbers. 
12, 30 

• 4
• 2
• 5
• 6

Tags

CCSS.6.NS.B.4

 Find the GCF of each set of numbers. 
50, 40

• 5
• 2
• 10
• 8

Tags

CCSS.6.NS.B.4