Grade 7 GCF/LCM

Find the Greatest  Common Factor (GCF) of 14 & 22.

• 1
• 2
• 7
• 14

Tags

CCSS.6.NS.B.4

Find the Greatest Common Factor (GCF) of 32 and 64.

• 1

• 2

• 4

• 32

Find the Greatest Common Factor (GCF) of 12, 18 & 30

• 1

• 3

• 6

• 12

What is the LCM of 16 and 24?

• 24

• 48

• 8

• 72

Avery gets newsletters by e-mail. He gets one for sports every 5 days, one for model railroads every 10 days, and one for music every 8 days. If he got all three today, how many more days will it be until he gets all three newsletters on the same day again? 

• 80 days
• 40 days
• 50 days
• 60 days

Tags

CCSS.6.NS.B.4

Jeremy has two pieces of wood:  one is 90 inches and the other is 72 inches. He wants to cut both pieces into smaller pieces of the same length.  What is the longest possible length he can cut and not have any lumber left over?

• 9
• 2
• 18
• 72

Tags

CCSS.6.NS.B.4

As 100 students entered the auditorium some were given a prize.  If every 6th student received a pencil and every 9th student received a notebook. How many participants received both a pencil and a notebook?

• 3 students
• 18 students
• 5 students
• 54 students

Tags

CCSS.6.NS.B.4

The sum of the LCM and GCF of two relatively prime number is 85. Then, which of the following cannot be these numbers?

Hint: The LCM of two relatively prime numbers is their product.

• 7 and 12

• 5 and 17

• 4 and 21

• 3 and 28

When number A is divided by 12 or 8, the remainder is always 5. Which of the following is the smallest 3-digit number A?

• 125

• 101

• 120

• 115

Anika made 36 jars of plum jelly and 48 jars of grape jelly. She is putting the jars into boxes of identical size. Each box will only have one kind of jelly. What is the greatest number of jars of jelly she can have in a box?

• 6

• 24

• 18

• 12