LCM and HCF 4

Ben exercises every 12 days and Isabel every 8 days. Ben and Isabel both exercised today. How many days will it be until they exercise together again?

• 4

• 6

• 12

• 24

Tags

CCSS.6.NS.B.4

Find the HCF and LCM of 15, 20 and 35.

• HCF = 5 and LCM = 420
• HCF = 5 and LCM = 402
• HCF = 15 and LCM = 10500
• HCF = 5 and LCM = 10500

(Hint: use HCF)
Vince has 12 jars of grape jam, 16 jars of strawberry jam, and 24 jars of raspberry jam. he wants to place the jam into the greatest number of boxes possible so that each box has the same number of jars of each kind of jam. How many boxes does he need?

• 4 boxes
• 3 boxes
• 6 boxes
• 12 boxes

(Hint: use LCM)
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

Find the HCF and LCM of 16 and 24.

• HCF = 8 and LCM = 48
• HCF = 8 and LCM = 384 
• HCF = 2 and LCM = 384
• HCF = 8 and LCM = 32 

Find the HCF and LCM of 15, 20 and 35.

• HCF = 5 and LCM = 420
• HCF = 5 and LCM = 402
• HCF = 15 and LCM = 10500
• HCF = 5 and LCM = 10500

HCF of 2² x 3⁶ x 5⁴ and 2 x 5² is

• 2² x 3⁶ x 5⁴

• 2 x 5²

• 2² x 3 x 5

• 2² x 5² is

Find the LCM of 2⁴x3⁵x5³x7² and 2³x3⁶x5x7⁸

• 2⁴x3⁶x5³x7⁸

• 2⁴x3⁵x5³x7²

• 2⁴x3⁶x5x7⁸

• 2³x3⁶x5x7⁸