LCM GCF Ladder

Find the GCF & LCM of 10 & 12

• GCF: 2, LCM: 30

• GCF: 2, LCM: 60

• GCF: 4, LCM: 60

• GCF: 6, LCM: 60

Find the LCM of 15 & 20

Find LCM of 9 & 21

Find LCM of 3 & 12

Find LCM of 6 & 8

A teacher is making identical activity packets using 92 crayons and 23 sheets of paper. What is the GREATEST number of packets the teacher can make with no items left over?

Answer explanation

Great job finding the GCF!

You have diving lessons every 5th day and swimming lessons every 3rd day. Today you have both lessons. In how many days will you have both lessons on the same day again?

The largest number that is in common for two or more numbers.

• LCM

• GCF

• Prime

• Composite

A number that is a factor of two or more counting numbers.

• factor

• dividend

• quotient

• common factor

Show your work on notebook paper using a factor T to give the GCF of the numbers below.

12 and 42

• 3

• 6

• 12

• answer not here