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Prime Numbers – Practice

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1. Which of the following numbers is prime?

1

9

11

15

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Question 1 of 5

2. Which of the following numbers is prime?

5

9

21

35

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Question 2 of 5

3. Which of the following numbers is prime?

4

6

13

27

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Question 3 of 5

4. Which of the following numbers is prime?

35

49

54

31

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Question 4 of 5

5. Which of the following numbers is prime?

17

21

25

27

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Question 5 of 5

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