Difficult Math Question #40 - Algebra - The Beat The GMAT Forum - Expert GMAT Help & MBA Admissions Advice

Difficult Math Question #40 - Algebra

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800guy: Master | Next Rank: 500 Posts; Posts: 354; Joined: Tue Jun 27, 2006 9:20 pmFollowed by: 5 members; Thanked: 11 times

by 800guy » Fri Oct 27, 2006 3:12 pm

don't have an OA for this question--also, don't really understand the prompt.

If X>0.9, which of the following equals to X?

A. 0.81^1/2 B. 0.9^1/2 C. 0.9^2 D. 1-0.01^1/2

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Source: Beat The GMAT — Problem Solving | Fri Oct 27, 2006 3:12 pm

ajith: Legendary Member; Posts: 1275; Joined: Thu Sep 21, 2006 11:13 pmFollowed by: 2 members; Location: Arabian Sea; Thanked: 125 times

Re: Difficult Math Question #40 - Algebra

by ajith » Fri Oct 27, 2006 8:46 pm

800guy wrote:don't have an OA for this question--also, don't really understand the prompt.

If X>0.9, which of the following equals to X?

A. 0.81^1/2 B. 0.9^1/2 C. 0.9^2 D. 1-0.01^1/2

A. 0.81^1/2 =0.9 is not X because X is greater than .9
B. 0.9^1/2 = This is greater than 0.9 and less than 1.0
C. 0.9^2 =0.81 Again does not satisfy the condition
D. 1-0.01^1/2= 1-0.1=0.9 is not X because X is greater than 0.9

B satisfy the condition X>0.9

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