II. Read each item carefully. Encircle the letter of the correct answer.
7. What are the factors of 18?
a. 1,2,3,6,9, and 18 b. 1,2,3,4,5, and 9
C. 1,2,3,4,6,7, and 18 d. 1,2,3,4,5 and 16
8. 1,2,4,5,8,10,20,and 40 are factors of what number?
a. 20
b. 10
C. 40
d. 25
9. What do you call a number greater than 1 which can be divided exactly by 1 and
itself?
a. Composite number
b. prime number
C. whole number
d. ordinal
10. Which of the following is a set of composite numbers?
a. 2,4,6,8,10 b. 1,3,5,7,9 C. 2,3,4,6,7 d. 12,14,15,11
11. What number is the product of the following prime factors 12 x 1, 6 x 2,4 x 3?
a. 24
b. 25
C. 12
d. 36
12. What are the common factors of 12 and 18?
a. 1,2,3,and 6 b. 1,2,3,and 5 C. 1,2,3 and 7
d. 1,2,3,and 14
13. What is the GCF of 32 and 40?
a. 8
b. 16
C. 20
d. 24​