1. Review Questions
OA.4

2. Write whether each number is prime or composite….
5 ____
19 ____
26 ___
9 ___
23 ___
31 ____

3. Which is NOT a composite number?
D. 29

4. Which is NOT a prime number?
D. 37

5. Carlos multiplied two numbers. The product was 40. One factor was 8
Carlos multiplied two numbers. The product was 40. One factor was 8. What was the other factor?

6. Mia multiplied two numbers. The product was 36
Mia multiplied two numbers. The product was 36. Both factors were the same. What were the factors?

7. How do you decide if a two digit number is a multiple of a one digit number?
Explain

8. What number pattern could help you remember multiples of 5? Explain….

9. Which are not factors of 36?
A. 2 and 16
B. 3 and 12
C. 4 and 9
D. 6 and 6

10. Which number has 3 and 9 as factors?

11. Which number is a multiple of 4?
D. 12

12. Dustin had 28 grapes. He put the same number of grapes in each bag
Dustin had 28 grapes. He put the same number of grapes in each bag. Which group of bags did Dustin make?
A. 2 bags of 12 grapes
B. 3 bags of 11 grapes
C. 4 bags of 7 grapes
D. 6 bags of 8 grapes

13. Kate’s street address is a number with only two factors
Kate’s street address is a number with only two factors. Which mailbox could be Kate’s?
A. 15
B. 17
C. 21
D. 27

14. Which is a multiple of 8?
A. 73
B. 48
C. 23
D. 18

15. Which number is NOT a prime number?
D. 16

16. Which number is a prime number and a factor of 18?

17. What number between 48 and 58 is a prime number?