هما
7. What are the factors of 18?
a. 1,2,3,6,9, and 18
C. 1,2,3,4,6,7, and 18
b. 1,2,3,4,5, and 9
d. 1,2,3,4,5 and 16
II. Read each item carefully. Encircle the letter of the correct answer.
8. 1,2,4,5,8,10,20, and 40 are factors of what number?
9. What do you call a number greater than 1 which can be divided exactly by 1 and
b. 10
itself?
a. Composite number
C.
whole number
a. 20
C. 40
d. 25
b. prime number
d. ordinal
10. Which of the following is a set of composite numbers?
b. 1,3,5,7,9 C. 2,3,4,6,7
a. 2,4,6,8,10
d. 12,14,15,11
11. What number is the product of the following prime factors 12 x1,6 x 2, 4 x 3?
b. 25
d. 36
a. 24
C. 12
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?​