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tim
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Post subject: Re: Each of the following equations has at least one solution  Posted: Tue Dec 13, 2011 2:46 am |
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| ManhattanGMAT Staff |
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Location: Southwest Airlines, seat 21C
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It doesn’t matter. Since this is an EXCEPT question, we’re just trying to find values of n that cause each expression to fail. Without any restrictions on n, we are of course free to test odd numbers, even numbers, or non-integers..
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Tim Sanders
Manhattan GMAT Instructor
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ffearth
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Post subject: Re: Each of the following equations has at least one solution Posted: Thu Apr 05, 2012 7:56 am |
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Posts: 21
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Last edited by ffearth on Wed May 23, 2012 2:47 pm, edited 1 time in total.
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tim
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Post subject: Re: Each of the following equations has at least one solution Posted: Sun Apr 08, 2012 4:25 pm |
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| ManhattanGMAT Staff |
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Location: Southwest Airlines, seat 21C
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because using a calculator is definitely a "math error" on the GMAT - one that will get you disqualified!
_________________
Tim Sanders
Manhattan GMAT Instructor
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mailsunild
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Post subject: Re: Each of the following equations has at least one solution Posted: Fri May 18, 2012 3:03 am |
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Hi, spent a lot of time to decipher, but could not. I picked 1 & 2 and checked for each of the options and got the below:
The Question as well as each ans is confusing, for eg. - how can 1/2 = -2 in result (B) below (or is my understanding itself is wrong?)?
If n=1:
A) -2 = -1/2
B) 1/2 = -2
C) 2 = -1/2
D) -2 = -2
E) -1/2 = -1/2
If n=2:
A) -4 = 1/4
B) 1/4 = 4
C) 4 = 1/4
D) 4 = -4
E) 1/4 = -1/4
Can someone explain please.
Thanks
Sunil
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tim
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Post subject: Re: Each of the following equations has at least one solution Posted: Sun May 27, 2012 3:49 am |
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| ManhattanGMAT Staff |
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Posts: 4404
Location: Southwest Airlines, seat 21C
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when you get things that don't equal, that means the specific number you plugged in doesn't work for that equation. take a closer look at what they're asking though: because this is an EXCEPT question, you need to find four answer choices that actually have solutions (i.e. the equation works). anytime you find one where the equation works, that WON'T be the answer. get rid of the four wrong answers and what's left is the right answer. try plugging in 0 and that will help..
_________________
Tim Sanders
Manhattan GMAT Instructor
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