Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

Re: If # represents +, -, *, or /, then does (a+b)#c = (a#c) + (b#c) for a [#permalink]

Show Tags

29 Nov 2010, 22:21

I initially chose D. Working quickly, I reasoned that both + and * would satisfy the distributive equation for all a, b, and c. But, when you write it out, this is obviously not the case...

Re: If # represents +, -, *, or /, then does (a+b)#c = (a#c) + (b#c) for a [#permalink]

Show Tags

29 Nov 2010, 23:55

From both the options we can not say that equation will be satisfied for all the values of a,b, and c... BUT we can say that equation will NOT be satisfied for all the values of a,b, and c.

Re: If # represents +, -, *, or /, then does (a+b)#c = (a#c) + (b#c) for a [#permalink]

Show Tags

30 Nov 2010, 00:16

Jennifer is this question write or it is (a+b)#c = (a#c) + (b#c)

Because if it is (a+b)#c = (a#b) + (b#c) as u have mentioned in the question then.. Statement 1 does not satisfy the condition in any way. Therefore (a+b)#c = (a#b) + (b#c) does not stand and this statement gives us the answer that condition is not possible.

Statement 2 also provide that (a+b)#c = (a#b) + (b#c) does not stand and this statement again gives us answer that condition is not possible.

And therefore answer will be "D"

But OA is "B" ... and for that the condition should be (a+b)#c = (a#c) + (b#c) and not as u mentioned in the question. In this Statement 1 will satisfy in * and / conditions and will not in + and - conditions But statement 2 will satisfy the condition and the answer will be "B"

Re: If # represents +, -, *, or /, then does (a+b)#c = (a#c) + (b#c) for a [#permalink]

Show Tags

30 Nov 2010, 00:49

JenniferClopton wrote:

From Grockit:

If # represents +, -, *, or /, then does (a+b)#c = (a#c) + (b#c) for all numbers a, b, and c?

1. 1#c = c#1

2. # represents +

I think the correct question ought to be as above

Statement 1 : 1#c=c#1 ... means # is either + or * ... If it is +, the answer is "no" ... If it is *, the answer is "yes" Statement 2 : Sufficient to answer "no"

If # represents +, -, *, or /, then does (a+b)#c = (a#b) + (b#c) for all numbers a, b, and c?

1. 1#c = c#1

2. # represents +

It should be: (a+b)#c = (a#c) + (b#c) instead of (a+b)#c = (a#b) + (b#c)

(1) 1#c = c#1 --> # can be either addition or multiplication: \(1*c=c*1\) and \(1+c=c+1\) (true for ALL numbers of a, b, and c). Now, if it's addition then we'll have: \(a+b+c\neq{a+c+b+c }\) (so it's doesn't hold true for ALL numbers a, b, and c, it holds true when c=0) and if it's multiplication then we'll have: \(ac+bc={ac+bc }\) (so it's holds true for ALL numbers of a, b, and c). Not sufficient.

(2) # represents + --> if # represents addition then given equation doesn't hold true for all numbers a, b, and c, it holds true when c=0. So we have the answer No to the question. Sufficient.

Re: If # represents +, -, *, or /, then does (a+b)#c = (a#c) + (b#c) for a [#permalink]

Show Tags

08 Jan 2014, 19:32

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

Re: If # represents +, -, *, or /, then does (a+b)#c = (a#c) + (b#c) for a [#permalink]

Show Tags

11 Feb 2015, 12:44

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

This is an example of a "symbolism" question - it involves a "made up" math symbol which you'll be asked to use to perform a basic set of calculations. You'll likely see 1 such question on the GMAT and it almost always involves some type of arithmetic or algebra.

We're told that the symbol # is one of 4 possible math functions: add, subtract, multiply, or divide.

We're asked if (A+B)#C = (A#C) + (B#C) for all numbers A, B, and C? This is a YES/NO question. The answer will depend on the actual 'meaning' of the symbol.

In these types of questions, it might be tempting to do a lot of pre-work before dealing with the two Facts. However, much of that work is NOT necessary, so in this case it would be a waste of time.

Fact 1: 1#C = C#1

This means that the symbol can be 1 of 2 possibilities: either 'add' or 'multiply'

Let's TEST VALUES to see what happens in each case:

IF..... A=1 B=2 C=3

# means 'add' (A+B)#C = (A#C) + (B#C) = (1+2)+3 = (1+3) + (2+3)? 6 = 4 + 5? The answer to the question is NO.

IF...# means 'multiply' (A+B)#C = (A#C) + (B#C) = (1+2)(3) = (1)(3) + (2)(3)? 9 = 3 + 6? The answer to the question is YES. Fact 1 is INSUFFICIENT

Fact 2: # represents "+"

Since we know the symbol can only represent one symbol, then we CAN answer the question. Fact 2 is SUFFICIENT.

After days of waiting, sharing the tension with other applicants in forums, coming up with different theories about invites patterns, and, overall, refreshing my inbox every five minutes to...

I was totally freaking out. Apparently, most of the HBS invites were already sent and I didn’t get one. However, there are still some to come out on...

In early 2012, when I was working as a biomedical researcher at the National Institutes of Health , I decided that I wanted to get an MBA and make the...