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.

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: GMAT Diagnostic Test Question 15 [#permalink]
13 May 2011, 06:22

Generally people mistake in the second statement , where one uses one's direct primary school concept where if bases are equal , then power has to be the same...... and thus p=1........... is not taken into consideration.. very tricky sum...

Re: GMAT Diagnostic Test Question 15 [#permalink]
20 Oct 2011, 06:37

Hi there, I had my problems with this problem too and chose Statement E since I could not figure out whether it's 0 or 1. Since this is a diagnostic test and many people haven't heard of the fact that GMAT might not test neither 0^0 nor 0! why don't we rephrase the question to:

If p is a non-zero integer, what is the value of p?

This is actually a way which is used quite often in the Official Guide.

How do i know what is not tested in GMAT ? I.e. 0^0. Is there a definitive list of things like this which are likely to throw you off ? (Not that the outcome of the problem changes, but it very well could in other problems). Thanks.

0^0, in some sources equals to 1, some mathematicians say it's undefined. Anyway you won't need this for GMAT because the case of 0^0 is not tested on the GMAT: http://www.manhattangmat.com/np-exponents.cfm

The fact that this concept is not tested on the GMAT means that you won't encounter a problem on the GMAT in which you should decide what 0^0 is equal to. So for example if there will be x^x in the problem then somehow the possibility of x being zero will be excluded, for example by saying that x is positive integer or by simply saying that x doesn't equal to zero.

So is this question valid anymore, if 0^0 is not tested???

(A) give me 3 values {-1,0,1} (B) gives 3 values {0,1,2} if we say 0^0 is not tested in the GMAT, then when p=0 the condition 0^0 = 0^2 should not be considered????

How do i know what is not tested in GMAT ? I.e. 0^0. Is there a definitive list of things like this which are likely to throw you off ? (Not that the outcome of the problem changes, but it very well could in other problems). Thanks.

It is not about whether 0^0 is tested or not on GMAT! 0^0 is not a number! You can use the term undefined or indeterminate.

For convenience, sometimes it is defined as 1, just to express some formulas simply, especially when computer coded. If you need a more mathematical discussion of the topic, see for example: http://mathworld.wolfram.com/Zero.html

Of course, you don't need to be a mathematician to do the GMAT quant ... it just happens that I am a mathematician.

So, for the GMAT purposes, you can be sure that 0^0 is not a number and treat it as such. The same holds for the division by 0. _________________

PhD in Applied Mathematics Love GMAT Quant questions and running.

Re: GMAT Diagnostic Test Question 15 [#permalink]
21 Nov 2012, 07:18

Tricky question, because I did not know that 0^0 cannot be determined and therefore I thought the answer was E. But you now for sure that 0^0 will not be tested on the GMAT

Re: GMAT Diagnostic Test Question 15 [#permalink]
14 Feb 2013, 18:31

How are we supposed to know that 0 isn't tested on the GMAT? 0^0 = 0^2, so this should work. And therefore, 0 or 1 could be the answer so answer to problem should be E, no?

Re: GMAT Diagnostic Test Question 15 [#permalink]
26 Feb 2013, 01:12

Hi guys,

I chose E answer. Before I read this topic, as many of the forum's members I had got 1, -1, 0 values from the statement 1 and 1, 0, 2 from the statement 2. Now as we know that 0^0 is not tested on the GMAT, why this question is still not corrected, for example this way: If p is an integer and not equal to zero, what is the value of p?