How many of the first ten positive whole numbers can be expressed as the sum of two different prime numbers?

Question

Adam Robinson

Mathematics

30 November, 17:10

How many of the first ten positive whole numbers can be expressed as the sum of two different prime numbers?

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Answers (1)

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Emmett Boone · Answer 1

1 = Not Possible

2 = Not Possible

3 = Not Possible

4 = 2 + 2

5 = 2 + 3

6 = 3 + 3

7 = 2 + 5

8 = 3 + 5

9 = 2 + 7

10 = 3 + 7

Taking into account that there must be two "Different" prime numbers, that leaves 5, 7, 8, 9, and 10. So 5 of the first 10 whole numbers.