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Which of the following numbers is prime?

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Math Expert
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Which of the following numbers is prime?  [#permalink]

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New post 06 Apr 2018, 03:38
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

73% (01:39) correct 28% (01:38) wrong based on 61 sessions

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Math Expert
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Re: Which of the following numbers is prime?  [#permalink]

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New post 06 Apr 2018, 03:39
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Re: Which of the following numbers is prime?  [#permalink]

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New post 09 Apr 2018, 08:23
3
117 is divisible by 3, as 1+1+7 = 9
133 is divisible by 7, as 140-7 = 133
189 is divisible by 3, as 1+8+9 = 18
209 is divisible by 11, as 220-11 = 209

So therefore I think that 223 is prime (E)
GMAT Club Bot
Re: Which of the following numbers is prime? &nbs [#permalink] 09 Apr 2018, 08:23
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Which of the following numbers is prime?

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