GCF & LCM

Factors

• Factors are numbers we multiply to get another number.

• Example: The first 5 factors of 12 are 1, 2, 3, 4, 6 because 1x12 = 12, 2x6 = 12, 3x4 = 12

Multiple Select

What are the factors of 18?

• {1,2,3,6,9,18}

• {2,4,6,8,10}

• {1,2,3,4,5,6}

• {18,32,46,84}

Multiple Select

What are the factors of 27?

• {1,2,3,4,5,6,7}

• {1,3,9,27}

• {27,54,81,108}

• {8,9,10,11,12}

Multiple Choice

Find the GCF of 22 and 55

• 11

• 9

• 15

• 6

Multiple Choice

Find the GCF of 18 and 27

• 12

• 9

• 15

• 6

Multiple Choice

Find the GCF of 30 and 24

• 12

• 9

• 15

• 6

Multiples

• Multiples are when you count by a number

• Example: the first 5 multiples of 5 are 5, 10, 15, 20, 25

Multiple Select

What are the multiples of 4?

• {1,2,2,4}

• {1,2,3,4,5}

• {4,8,12,16,20,24}

• {6,7,8,9,10}

Multiple Select

What are the multiples of 7?

• {7,14,21,28,35}

• {1,2,3,4,5}

• {1,7}

• {6,7,8,9,10}

Multiple Choice

Find the LCM of 2 and 10.

• 4

• 8

• 10

• 20

Multiple Choice

Find the LCM of 8 and 12.

• 24

• 5

• 16

• 48

Multiple Choice

Find the LCM of 14 and 4.

• 12

• 4

• 24

• 28