Factors & Multiples (GCF/LCM)

What is the greatest common factor of 10 and 25?

• 5
• 1
• 10
• ^₁

Which is a factor of 15?

• 2
• 3
• 4
• 6

GCF stands for:

• Greatest cat fish
• Greatest common feather
• Greatest common factor
• Give chickens freedom

Which number is a multiple of 11?

• 25

• 35

• 45

• 55

Which set of numbers shows all of the factors of 30?

• 30, 60, 90, 120, 150

• 2, 3, 5, 6, 10, 15

• 1, 2, 3, 5, 6, 12, 10, 15, 30

• 1, 2, 3, 5, 6, 10, 15, 30

Which number is a factor of 24

• 9
• 7
• 11
• 12

A prime number is...

• a number that has only one factor.
• a number that has at least two factors.
• a number that has more than two factors.
• a number that has only two factors.
  (1 and itself)

What is the LCM of 4 and 12? 

• 4
• 8
• 12
• 16

Joe has listed the first 4 multiples of 7 as: 
7   14    22     28
Which one is incorrect?

• 7
• 14
• 22
• 28

Is 3 a factor of 12?

• yes
• no