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# Kaplan math problem

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Intern
Joined: 12 Aug 2004
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Kaplan math problem [#permalink]  20 Nov 2004, 19:16
Hello fellow GMAT club members, will someone like ot break this problem down for me.

I could use a good explanation.
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Joined: 15 Dec 2003
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Hi jeremy, I agree with E. First, you have to realize that if (-1)*x = 1, then x=-1
Then, just plug in -1 in each of I, II and III and you will get an integer.
I) -1 / 2+(-1) = -1/1 = -1 --> this is an integer
II) -1-2 / 3 = -3/3 = -1 --> this is an integer
III) -1+1 / 4 = 0/4 = 0 --> this is an integer
_________________

Best Regards,

Paul

CIO
Joined: 09 Mar 2003
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Paul wrote:
Hi jeremy, I agree with E. First, you have to realize that if (-1)*x = 1, then x=-1
Then, just plug in -1 in each of I, II and III and you will get an integer.
I) -1 / 2+(-1) = -1/1 = -1 --> this is an integer
II) -1-2 / 3 = -3/3 = -1 --> this is an integer
III) -1+1 / 4 = 0/4 = 0 --> this is an integer

Agree with this. The hardest part of the problem is the crappy Kaplan cd making the equation look stupid. To me, it looks like [(-1)^x]x=1, which means nothing at all. So if that threw you off, don't worry - Kaplan is often nothing like the real test and you won't have the problem on the real exam.

am I being transparent about my feelings for Kaplan? I've never been too diplomatic....
CIO
Joined: 09 Mar 2003
Posts: 464
Followers: 2

Kudos [?]: 34 [0], given: 0

Paul wrote:
Hi jeremy, I agree with E. First, you have to realize that if (-1)*x = 1, then x=-1
Then, just plug in -1 in each of I, II and III and you will get an integer.
I) -1 / 2+(-1) = -1/1 = -1 --> this is an integer
II) -1-2 / 3 = -3/3 = -1 --> this is an integer
III) -1+1 / 4 = 0/4 = 0 --> this is an integer

Agree with this. The hardest part of the problem is the crappy Kaplan cd making the equation look stupid. To me, it looks like [(-1)^x]x=1, which means nothing at all. So if that threw you off, don't worry - Kaplan is often nothing like the real test and you won't have the problem on the real exam.

am I being transparent about my feelings for Kaplan? I've never been too diplomatic....
Manager
Joined: 28 Aug 2004
Posts: 205
Followers: 1

Kudos [?]: 1 [0], given: 0

What I am hearing lately from people who did the GMAT that Kaplan's questions don't look like anything GMAT!!

Their questions are 'difficult' but that doesn't mean they cover the spirit of GMAT's questions.

Princeton Review contains a lot of errors and mistakes. Barron's sucks......and so on.

What's going on guys? An input from those who did the exam would be great. What do you think Ian?
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