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Buy "All-In-One Standard ($149)", get free Daily quiz (2 mon). Coupon code : SPECIAL # If n=1 and (m-n)/p=2 then which of the following is not a  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics Author Message TAGS: ### Hide Tags Manager Joined: 04 Feb 2012 Posts: 156 Location: India Concentration: General Management, Strategy GRE 1: Q162 V160 GPA: 3.96 WE: Research (Pharmaceuticals and Biotech) If n=1 and (m-n)/p=2 then which of the following is not a [#permalink] ### Show Tags Updated on: 07 Jun 2013, 06:30 1 7 00:00 Difficulty: 45% (medium) Question Stats: 64% (01:24) correct 36% (01:33) wrong based on 315 sessions ### HideShow timer Statistics If n=1 and $$\frac{m-n}{p}=2$$ then which of the following is not a possible value of m? A. -2 B. -1 C. 0 D. 1 E. 2 This is Q 36 from Total GMAT MATH, I don't get the explanation provided in the book! BB please! Originally posted by HBSdetermined on 07 Jun 2013, 06:25. Last edited by Bunuel on 07 Jun 2013, 06:30, edited 1 time in total. RENAMED THE TOPIC. Math Expert Joined: 02 Sep 2009 Posts: 52938 Re: If n=1 and (m-n)/p=2 then which of the following is not a [#permalink] ### Show Tags 07 Jun 2013, 06:32 1 1 akhilright wrote: If n=1 and $$\frac{m-n}{p}=2$$ then which of the following is not a possible value of m? A. -2 B. -1 C. 0 D. 1 E. 2 This is Q 36 from Total GMAT MATH, I don't get the explanation provided in the book! BB please! Since n=1, then we have that $$\frac{m-1}{p}=2$$. Now, if m=1, then $$\frac{m-1}{p}=\frac{0}{p}=0\neq{2}$$. Answer: D. Hope it's clear. P.S. Please read carefully and follow: rules-for-posting-please-read-this-before-posting-133935.html Pay attention to the rule #3. Thank you. _________________ Manager Joined: 04 Feb 2012 Posts: 156 Location: India Concentration: General Management, Strategy GRE 1: Q162 V160 GPA: 3.96 WE: Research (Pharmaceuticals and Biotech) Re: If n=1 and (m-n)/p=2 then which of the following is not a [#permalink] ### Show Tags 07 Jun 2013, 06:37 Thanks BB, That was pretty simple, I just complicated the math in a away where I got lost! Thanks Intern Joined: 28 Apr 2013 Posts: 16 GMAT Date: 08-03-2013 GPA: 3.3 WE: Supply Chain Management (Military & Defense) Re: If n=1 and (m-n)/p=2 then which of the following is not a [#permalink] ### Show Tags 07 Jun 2013, 06:37 1 I don't know what the given solution is from the Total GMAT Math Book but what I did was look for an answer that made the numerator zero. For any other integer for $$m$$ (given $$n=1$$) we can likely find a value for $$p$$ that satisfies the equation. The only situation where this doesn't happen is if the numerator is zero. It's impossible to divide zero by any number and get $$2$$. Hope this helps! Guess I wasn't fast enough on my reply lol. Math Expert Joined: 02 Sep 2009 Posts: 52938 Re: If n=1 and (m-n)/p=2 then which of the following is not a [#permalink] ### Show Tags 07 Jun 2013, 06:40 akhilright wrote: Thanks BB, That was pretty simple, I just complicated the math in a away where I got lost! Thanks BB: members/member-3.html Bunuel: members/member-73391.html Two different people. _________________ Manager Joined: 04 Feb 2012 Posts: 156 Location: India Concentration: General Management, Strategy GRE 1: Q162 V160 GPA: 3.96 WE: Research (Pharmaceuticals and Biotech) Re: If n=1 and (m-n)/p=2 then which of the following is not a [#permalink] ### Show Tags 07 Jun 2013, 06:44 Bunuel wrote: akhilright wrote: Thanks BB, That was pretty simple, I just complicated the math in a away where I got lost! Thanks BB: members/member-3.html Bunuel: members/member-73391.html Two different people. OOOpps my BAD....! apologies...! Manager Joined: 04 Feb 2012 Posts: 156 Location: India Concentration: General Management, Strategy GRE 1: Q162 V160 GPA: 3.96 WE: Research (Pharmaceuticals and Biotech) Re: If n=1 and (m-n)/p=2 then which of the following is not a [#permalink] ### Show Tags 07 Jun 2013, 07:00 This is what I did initially and would warn ppl not to complicate unnecessarily: I took the fraction $$\frac{m-n}{p}=2$$ and simplified it to $$m-n=2p$$ further as given n=1, I simplified it and got $$m=2p+1$$ then I looked on the answers and trying to find an even number as m seems to be an odd one!...and so I created a mental block and cudn think of simply looking for a number which could make the numerator 0 !!!!!! I end up doing such things and get a Q44! on the real test Phew! Math Expert Joined: 02 Sep 2009 Posts: 52938 Re: If n=1 and (m-n)/p=2 then which of the following is not a [#permalink] ### Show Tags 07 Jun 2013, 07:05 akhilright wrote: This is what I did initially and would warn ppl not to complicate unnecessarily: I took the fraction $$\frac{m-n}{p}=2$$ and simplified it to $$m-n=2p$$ further as given n=1, I simplified it and got $$m=2p+1$$ then I looked on the answers and trying to find an even number as m seems to be an odd one!...and so I created a mental block and cudn think of simply looking for a number which could make the numerator 0 !!!!!! I end up doing such things and get a Q44! on the real test Phew! Notice that 2p+1 (m) would be and odd number if p is an integer. _________________ Manager Joined: 04 Feb 2012 Posts: 156 Location: India Concentration: General Management, Strategy GRE 1: Q162 V160 GPA: 3.96 WE: Research (Pharmaceuticals and Biotech) Re: If n=1 and (m-n)/p=2 then which of the following is not a [#permalink] ### Show Tags 07 Jun 2013, 07:09 Bunuel wrote: akhilright wrote: This is what I did initially and would warn ppl not to complicate unnecessarily: I took the fraction $$\frac{m-n}{p}=2$$ and simplified it to $$m-n=2p$$ further as given n=1, I simplified it and got $$m=2p+1$$ then I looked on the answers and trying to find an even number as m seems to be an odd one!...and so I created a mental block and cudn think of simply looking for a number which could make the numerator 0 !!!!!! I end up doing such things and get a Q44! on the real test Phew! Notice that 2p+1 (m) would be and odd number if p is an integer. OK, Finally I get the reason why we should not use 'p' in our calculation because we don't know if its an integer or not! Thanks BUNUEL! Current Student Joined: 09 Apr 2013 Posts: 41 Location: United States (DC) Concentration: Strategy, Social Entrepreneurship Schools: Ross '20 (A$)
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Re: If n=1 and (m-n)/p=2 then which of the following is not a  [#permalink]

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07 Jun 2013, 08:43
akhilright wrote:
Bunuel wrote:
akhilright wrote:
This is what I did initially and would warn ppl not to complicate unnecessarily:

I took the fraction $$\frac{m-n}{p}=2$$ and simplified it to $$m-n=2p$$ further as given n=1, I simplified it and got $$m=2p+1$$ then I looked on the answers and trying to find an even number as m seems to be an odd one!...and so I created a mental block and cudn think of simply looking for a number which could make the numerator 0 !!!!!!

I end up doing such things and get a Q44! on the real test

Phew!

Notice that 2p+1 (m) would be and odd number if p is an integer.

OK, Finally I get the reason why we should not use 'p' in our calculation because we don't know if its an integer or not! Thanks BUNUEL!

You can also see that the only time the equation will not work is if p=0.
So make p=0 and solve for m:

$$\frac{m-n}{p}=2$$

$$\frac{m-1}{0}=2$$

m - 1 = 0
m = 1
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Re: If n=1 and (m-n)/p=2 then which of the following is not a  [#permalink]

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07 Jun 2013, 10:07
I'm surprised the question stem does not say p != 0. Typically, most of the GMAT questions I have seen specify such condition.
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Re: If n=1 and (m-n)/p=2 then which of the following is not a  [#permalink]

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07 Jun 2013, 10:15
nt2010 wrote:
I'm surprised the question stem does not say p != 0. Typically, most of the GMAT questions I have seen specify such condition.

The fact that $$p\neq{0}$$ is implied in the condition $$\frac{m-n}{p}=2$$. If $$p$$ were $$0$$ that expression would not be defined.

Hope it's clear
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Re: If n=1 and (m-n)/p=2 then which of the following is not a  [#permalink]

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07 Jun 2013, 10:17
as others have already clarified , I will try to put it this way.

For all the other options except 1 LHS of the equation in the question stem is "some number" (since we don't know the value of P and whether it is an integer or not is also an unknown".

For the valuei choice D i.e. 1, Irrespective of the value of P ' It has to be 0 since the numerator becomes zero and so It can not be the value of M since RHS is not 0
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Re: If n=1 and (m-n)/p=2 then which of the following is not a  [#permalink]

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08 Jun 2013, 03:06
lchen wrote:
You can also see that the only time the equation will not work is if p=0.
So make p=0 and solve for m:

$$\frac{m-n}{p}=2$$

$$\frac{m-1}{0}=2$$

m - 1 = 0
m = 1

That's not correct: (m-n)/p=2 implies that p does not equal to zero, division by 0 is not allowed.
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Re: If n=1 and (m-n)/p=2 then which of the following is not a  [#permalink]

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06 Aug 2014, 20:38
Its simple.. if the value of m=1, the LHS becomes 0 and so cannot be 2,

no m cannot be 1
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Re: If n=1 and (m-n)/p=2 then which of the following is not a  [#permalink]

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16 Aug 2014, 01:09
Bunuel wrote:
lchen wrote:
You can also see that the only time the equation will not work is if p=0.
So make p=0 and solve for m:

$$\frac{m-n}{p}=2$$

$$\frac{m-1}{0}=2$$

m - 1 = 0
m = 1

That's not correct: (m-n)/p=2 implies that p does not equal to zero, division by 0 is not allowed.

That is exactly why Ichen chose to solve the equation for m when p=0, because we are looking for the value of m that is not possible
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Re: If n=1 and (m-n)/p=2 then which of the following is not a  [#permalink]

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21 Jan 2019, 12:16
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Re: If n=1 and (m-n)/p=2 then which of the following is not a   [#permalink] 21 Jan 2019, 12:16
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