Review Questions

OA.4

• Write whether each number is prime or composite….

• 5 ____• 19 ____• 26 ___• 9 ___• 23 ___• 31 ____

• Which is NOT a composite number?

• A. 12

• B. 18

• C. 20

• D. 29

• Which is NOT a prime number?

• A. 14

• B. 17

• C. 19

• D. 37

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

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

• How do you decide if a two digit number is a multiple of a one digit number?

• Explain

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

• Which are not factors of 36?

• A. 2 and 16

• B. 3 and 12

• C. 4 and 9

• D. 6 and 6

• Which number has 3 and 9 as factors?

• A. 12

• B. 24

• C. 27

• D. 49

• Which number is a multiple of 4?

• A. 9

• B. 10

• C. 11

• D. 12

• 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

• 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

• Which is a multiple of 8?

• A. 73

• B. 48

• C. 23

• D. 18

• Which number is NOT a prime number?

• A. 2

• B. 5

• C. 7

• D. 16

• Which number is a prime number and a factor of 18?

• A. 3

• B. 6

• C. 9

• D. 18

• What number between 48 and 58 is a prime number?