4. Which of these numbers is a multiple of 4?
A. 10
B. 15
C. 20
D. 25
5. 6, 9, 12, 15 and 18 are multiples of
A. 2
B. 3
C. 4
D. 5
6. Which of these numbers is NOT a multiple of 7?
A. 21
B. 25
C. 28
D. 35
7. These are numbers with more than two factors.
A. prime number
B. composite number
C. even number
D. odd number
8. It is a number that can be divided exactly by 1 and itself.
A. prime number
B. composite number
C. even number
D. odd number
9. Which is a composite number?
A. 17
B. 39
C. 53
D. 51
10. Which of the following is a prime number?
A. 21
B. 33
C. 67 D. 69​