GCF & LCM Jeopardy!

GCF

100

Find the GCF of 12 & 16

4

200

Find the GCF of 6 & 18

answer: 6 

plus 500 points

300

Find the GCF of 20 & 35

5

400

Find the GCF of 45 and 60

15

500

The third planet from the sun

What is Earth?

LCM

100

Find the LCM of 6 & 9

18

200

Find the LCM of 18 & 12

36

300

Find the LCM of 9 & 12

36

400

Find the LCM of 60 & 75

300

Bonus.... double the points

500

What teacher teaches 6th grade Social Studies and Science.

Mr. Morris......

Box Method

100

When finding GCF, do you multiply or divide the numbers on the outside of the box?

Multiply

200

How many times do you have to keep dividing into the numbers that your trying to find the GCF or LCM of?

Until one is prime.

300

What do you get for picking this card?

Extra points!!! add 500 points

400

When try to find the LCM, what do you multiply as your last step?

The bottom right and top left.

500

can you divide by prime numbers?

yes

Listing Factors/Multiples

100

When trying to find LCM, should you circle the greater of the common multiples, or the smallest?

The smallest

200

When list in you multiples, it's what you do to show that the list of multiples goes on forever.

What is comma dot dot dot?

300

List the factors of 18 and 6, the circle the GCF.

18:1,2,3,(6),9,18

6:1,2,3,(6)

400

When you are listing your multiples do you need to add, or subtract?

Add

500

What do you use GCF & LCM for?

answers will vary.

Miscellaneous

100

Earth is covered mostly by.....what?

Water

300

What is the name of the gas in the air that keeps us alive.

Oxygen

400

The imaginary line around the middle of the Earth that divides it into the Northern and Southern Hemispheres.

What is the Equator?

500

True or False

8/12=6/9

True