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N = K^2, where K is a positive integer. Find N. (S1) K is an

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Manager
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Joined: 14 May 2005
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Location: San Francisco
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Kudos [?]: 2 [0], given: 0

N = K^2, where K is a positive integer. Find N. (S1) K is an [#permalink] New post 22 Oct 2006, 17:19
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E

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N = K^2, where K is a positive integer. Find N.

(S1) K is an odd prime
(S2) N has exactly four positive factors
Senior Manager
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Joined: 08 Jun 2006
Posts: 343
Location: Washington DC
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Kudos [?]: 14 [0], given: 0

 [#permalink] New post 22 Oct 2006, 17:36
S1 insufficient
K = 3 or 5 or 7 or 11...

S2 insufficient
(Question does not say distinct factors)
N = k ^ 2
Factors are 1, k, k, N
This is possible only when k is prime. Possible values for k = 2 or 3 or 5 or 7 or 11...

Together insufficient

E
Manager
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Joined: 14 May 2005
Posts: 85
Location: San Francisco
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Kudos [?]: 2 [0], given: 0

 [#permalink] New post 09 Nov 2006, 22:10
Thanks fellows, for your responses. The OA is E.
  [#permalink] 09 Nov 2006, 22:10
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N = K^2, where K is a positive integer. Find N. (S1) K is an

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