WRITING NUMBERS AS THE SUM OF PRIME NUMBERS WORKSHEET

Question 1 :

Write 5 as the sum of two consecutive primes.

Question 2 :

Write 7 as the sum of any two different primes.

Question 3 :

Write 8 as the sum of two consecutive primes.

Question 4 :

Write 10 as the sum of any two different odd primes.

Question 5 :

Write 10 as the sum of three consecutive primes.

Question 6 :

Write 12 as the sum of two consecutive primes.

Question 7 :

Write 17 as the sum of any four diffferent primes.

Question 8 :

Write 18 as the sum of any three different primes.

Question 9 :

Write 20 as the sum of any two diffferent primes.

Question 10 :

Write 20 as the sum of any two diffferent primes.

Question 11 :

Write 20 as the sum of any three diffferent primes.

Question 12 :

Write 21 as the sum of any four diffferent primes.

Question 13 :

Write 22 as the sum of any three diffferent primes.

Question 14 :

Write 23 as the sum of any four diffferent primes.

Question 15 :

Write 24 as the sum of any three diffferent primes.

Question 16 :

Write 25 as the sum of any two diffferent primes.

Question 17 :

Write 26 as the sum of any two diffferent primes.

Question 18 :

Write 26 as the sum of any four diffferent primes.

Question 19 :

Write 27 as the sum of any four diffferent primes.

Question 20 :

Write 27 as the sum of any three diffferent primes.

Question 21 :

Write 28 as the sum of any three diffferent primes.

Question 22 :

Write 29 as the sum of any four diffferent primes.

In the table shown below, the crossed-out numbers are composite and the coloured numbers (encircled) are primes.

Using the table above, answers the following questions.

Question 23 :

Write 42 as the sum of two consecutive primes.

Question 24 :

Write 52 as the sum of two consecutive primes.

Question 25 :

Write 60 as the sum of two consecutive primes.

Question 26 :

Write 68 as the sum of two consecutive primes.

Question 27 :

Write 78 as the sum of two consecutive primes.

Question 28 :

Write 78 as the sum of two consecutive primes.

Question 29 :

Write 90 as the sum of two consecutive primes.

Question 30 :

Write 100 as the sum of two consecutive primes.

Question 31 :

Write 128 as the sum of two consecutive primes.

Question 32 :

Write 31 as the sum of any three odd primes.

Question 33 :

Write 55 as the sum of any three odd primes.

Question 34 :

Write 79 as the sum of any three odd primes.

Question 35 :

Write 104 as the sum of any three primes.

Answers

1. Answer :

5 = 2 + 3

2. Answer :

7 = 2 + 5

3. Answer :

8 = 3 + 5

4. Answer :

10 = 3 + 7

5. Answer :

10 = 2 + 3 + 5

6. Answer :

12 = 5 + 7

7. Answer :

17 = 2 + 3 + 5 + 7

8. Answer :

18 = 2 + 3 + 13

9. Answer :

20 = 7 + 13

10. Answer :

20 = 7 + 13

11. Answer :

20 = 2 + 7 + 11

12. Answer :

21 = 2 + 3 + 5 + 11

13. Answer :

22 = 2 + 3 + 17

14. Answer :

23 = 2 + 3 + 5 + 13

15. Answer :

24 = 2 + 3 + 19

16. Answer :

25 = 2 + 23

17. Answer :

26 = 3 + 23

18. Answer :

26 = 3 + 5 + 7 + 11

19. Answer :

27 = 2 + 3 + 5 + 17

20. Answer :

27 = 3 + 5 + 19

21. Answer :

28 = 2 + 3 + 23

22. Answer :

29 = 2 + 3 + 5 + 19

23. Answer :

42 = 19 + 23

24. Answer :

52 = 23 + 29

25. Answer :

60 = 29 + 31

26. Answer :

68 = 31 + 37

27. Answer :

78 = 37 + 41

28. Answer :

84 = 41 + 43

29. Answer :

90 = 43 + 47

30. Answer :

100 = 47 + 53

31. Answer :

128 = 61 + 67

32. Answer :

31 = 5 + 7 + 19

33. Answer :

55 = 3 + 23 + 29

34. Answer :

79 = 19 + 29 + 31

35. Answer :

104 = 2 + 19 + 83

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