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are v and w integers? 1) (v+w)^1/2 is an integer 2) v/w is

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VP
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Joined: 25 Nov 2004
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are v and w integers? 1) (v+w)^1/2 is an integer 2) v/w is [#permalink] New post 26 Feb 2005, 22:43
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A
B
C
D
E

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(N/A)

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0% (00:00) correct 0% (00:00) wrong based on 0 sessions
are v and w integers?
1) (v+w)^1/2 is an integer
2) v/w is an integer
Senior Manager
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Joined: 19 Feb 2005
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Location: Milan Italy
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 [#permalink] New post 27 Feb 2005, 01:30
picking numbers
(6+3)^1/2=integer
6/3=integer as well

BUT
(9/2+9/2)^1/2=integer
9/2*2/9=1=integer as well

So E
Director
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 [#permalink] New post 27 Feb 2005, 04:14
taking some sample examples we can disporve both statmemnets

E
VP
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 [#permalink] New post 27 Feb 2005, 19:25
"E"

state 1....v+w = n^2.....no way to tell if both r integers or not

state 2....v = mw.....again insuff


combine

w = n^2/m+1.....not suff
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 [#permalink] New post 28 Feb 2005, 09:39
E it is ...

pick numbers like 1/2 and 2

both are possible solutions....E it is..
  [#permalink] 28 Feb 2005, 09:39
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are v and w integers? 1) (v+w)^1/2 is an integer 2) v/w is

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