Finding the GCF and LCM

2. What are the common factors of 11, 22, and 33?

• A. 1, 2, 11

• B. 1, 3, 11

• C. 1, 13

• D. 1, 11

3. How many common factors are there in 4, 8, and 12 other than 1?

• A. 1

• B. 2

• C. 3

• D. 4

4. What is the GCF or greatest common factor of 25, 30, and 40?

• A. 2

• B. 5

• C. 10

• D. 20

5. If the greatest common factor of 24, 40, and 32 is 8, what are the other factors?

• A. 1, 2, 4

• B. 1, 2, 4, 6  

• C. 1, 3, 4

• D. 1, 2, 3, 6

6. Which of the following sets of numbers has the GCF of 6?

• A. 8, 10, 12

• B.  12, 14, 16

• C.  16, 20, 24

• D.  24, 36, 18

7. Using the continuous division method, what are we going to do with the prime divisors and the quotients of the given numbers in finding for the LCM?

• A. add

• B. subtract

• C. multiply

• D. divide

8. What is the LCM of 5, 6, and 15?

• A. 10

• B. 20

• C. 30

• D. 40

9. Which of the following numbers has the LCM of 56?

• A. 4, 7, 8

• B.  8, 6, 12 

• C.  7, 9, 12  

• D.  12, 14, 18

10. When do you say that the given numbers are relatively prime?

• A. all the given numbers are prime                

• B. no common multiples other than one

• C. all the multiples are prime

• D. there is only one common  multiple

1. What is the other term for Continuous Division Method which is a process of solving for the GCF of two or more numbers?

• A. Grouping Method                   

• B. Factoring Method                   

• C.  Ladder Method

• D.  Dividing Method