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What is the sum of the unique prime factors of 207?

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Math Expert
Joined: 02 Sep 2009
Posts: 60627
What is the sum of the unique prime factors of 207?  [#permalink]

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16 Aug 2017, 00:18
00:00

Difficulty:

15% (low)

Question Stats:

75% (00:55) correct 25% (01:03) wrong based on 97 sessions

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What is the sum of the unique prime factors of 207?

(A) 23
(B) 26
(C) 29
(D) 69
(E) 207

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Intern
Joined: 28 May 2017
Posts: 18
Re: What is the sum of the unique prime factors of 207?  [#permalink]

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16 Aug 2017, 00:33
1
B 26 according to me

As 207 = 3*3*23

So we need sun of unique prime no
3+23 = 26

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Re: What is the sum of the unique prime factors of 207?   [#permalink] 16 Aug 2017, 00:33
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What is the sum of the unique prime factors of 207?

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