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Which of the following cannot be the sum of 3 different prime numbers?

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Kudos [?]: 132657 [0], given: 12331

Which of the following cannot be the sum of 3 different prime numbers? [#permalink]

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New post 11 Apr 2016, 04:08
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Kudos [?]: 132657 [0], given: 12331

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Re: Which of the following cannot be the sum of 3 different prime numbers? [#permalink]

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New post 11 Apr 2016, 08:37
Bunuel wrote:
Which of the following cannot be the sum of 3 different prime numbers?

A. 10
B. 13
C. 14
D. 15
E. 19


Since the options given here are small, we can try the brute fore method.

Option A: 10 = 2+3+5. Sum of 3 different prime numbers.
Option B: 13. This cannot be expressed as a sum of 3 different prime numbers
Option C: 14 = 2 + 5 + 7. Sum of 3 different prime numbers
Option D: 15 = 3 + 5 + 7. Sum of 3 different prime numbers
Option E: 19 = 3 + 5 + 11. Sum of 3 different prime numbers

Correct Option: B
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Re: Which of the following cannot be the sum of 3 different prime numbers? [#permalink]

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New post 30 Sep 2017, 04:30
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Kudos [?]: 282 [0], given: 0

Re: Which of the following cannot be the sum of 3 different prime numbers?   [#permalink] 30 Sep 2017, 04:30
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Which of the following cannot be the sum of 3 different prime numbers?

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