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# No quick solution ??

Author Message
Intern
Joined: 04 Jan 2018
Posts: 1

### Show Tags

04 Jan 2018, 05:31
00:00

Difficulty:

(N/A)

Question Stats:

33% (00:09) correct 67% (03:20) wrong based on 3 sessions

### HideShow timer Statistics

Hi, my Name is Lucas and I'm relatively new here.

I have found a question in a set of flashcards that I cannot find a quick answer for. Plugging in the numbers seems way too time intensive (way over 3 minutes for me).
does someone have a quicker fix ?

If $$x^2=y+5$$, $$y=z-2$$ and$$z=2x$$, is $$x^3+y^2+z$$ divisible by 7 ?

x>0
y=4

after plugging in everything it just becomes a crazy long intricate function (for me at least). I got to the answer but it took way too long.

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

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Math Expert
Joined: 02 Sep 2009
Posts: 52327
Re: No quick solution ??  [#permalink]

### Show Tags

04 Jan 2018, 05:49
HabemusPapam wrote:
Hi, my Name is Lucas and I'm relatively new here.

I have found a question in a set of flashcards that I cannot find a quick answer for. Plugging in the numbers seems way too time intensive (way over 3 minutes for me).
does someone have a quicker fix ?

If $$x^2=y+5$$, $$y=z-2$$ and$$z=2x$$, is $$x^3+y^2+z$$ divisible by 7 ?

x>0
y=4

after plugging in everything it just becomes a crazy long intricate function (for me at least). I got to the answer but it took way too long.

Discussed here: if-x-2-y-5-y-z-2-and-z-2x-is-x-3-y-2-z-95789.html

Hope it helps.

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________
Re: No quick solution ?? &nbs [#permalink] 04 Jan 2018, 05:49
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