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# No quick solution ??

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Intern
Joined: 04 Jan 2018
Posts: 1

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

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04 Jan 2018, 05:31
00:00

Difficulty:

(N/A)

Question Stats:

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

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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.
[Reveal] Spoiler: OA

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

Math Expert
Joined: 02 Sep 2009
Posts: 43348

Kudos [?]: 139643 [0], given: 12794

Re: No quick solution ?? [#permalink]

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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: https://gmatclub.com/forum/if-x-2-y-5-y ... 95789.html

Hope it helps.
_________________

Kudos [?]: 139643 [0], given: 12794

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

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