LCM and GCF

What is the LCM of 14 and 21?

• 7

• 42

• 210

• 294

Select all the factors of 12?

• 2

• 4

• 5

• 6

• 8

What is the GCF of 48 and 72

(a)  

What should go where the question mark is?

• 3

• 6

• 9

• 10

What should go where the question mark is?

• 2

• 4

• 7

• 14

This is the prime factorization of what number? $2^2\times3\times11$  

(a)  

What is the prime factorization of 48?

• $2^3\times3$

• $2^4\times3$

• $2^2\times3^2$

• $2^5$

What is the LCM of 15 and 20?

(a)  

What is the GCF of 42 and 70

• 7

• 10

• 14

• 21

Pete's Sweets sells donuts in packages of 12. Across town, Mercer Pastries sells donuts in packages of 4. If Cindy wants to buy the same number of donuts from each bakery for a taste test, what is the smallest number of donuts she will have to buy from each?

• 2

• 4

• 12

• 24

• 48