DS 19

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dunkin77: Master | Next Rank: 500 Posts; Posts: 269; Joined: Sun Apr 01, 2007 5:41 am

by dunkin77 » Thu May 31, 2007 4:42 am

Hi,

The answer is B but why not 1)? if n^2 is integer, I thought n also must be an integer.... Can anyone explain why 1) is insuf?

PS .... I thought I posted the same question before but could not search it...so sorry if I duplicate the question...

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Source: Beat The GMAT — Data Sufficiency | Thu May 31, 2007 4:42 am

mschling52: Master | Next Rank: 500 Posts; Posts: 105; Joined: Mon Sep 18, 2006 12:34 pm; Location: OH; Thanked: 7 times; GMAT Score:780

by mschling52 » Thu May 31, 2007 5:13 am

If n is a number such as sqrt(3), then n^2 = 3, but n is not an integer, n = 1.73205...

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dunkin77: Master | Next Rank: 500 Posts; Posts: 269; Joined: Sun Apr 01, 2007 5:41 am

by dunkin77 » Thu May 31, 2007 5:26 am

Indeed - yes. thankyou!

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