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# Need expert advice - Is 0 a perfect square on the GMAT?

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Intern
Joined: 06 Sep 2018
Posts: 37
GMAT 1: 760 Q50 V44
GMAT 2: 740 Q48 V44
Need expert advice - Is 0 a perfect square on the GMAT?  [#permalink]

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11 Oct 2018, 12:57
1
Apologies for the weird question. I searched and saw other threads, but didn't see any response from experts etc.

Does the GMAT consider 0 to be a perfect square, cube etc? - Mainly concerned in case a DS question states "x is a perfect square" - Then I need to know if 0 can be considered or not.
Moreover, would -27 be a perfect cube? - And more generally, for "perfect cubes", can I consider negative numbers since sign is kept?

Thank you so much.
Director
Status: Learning stage
Joined: 01 Oct 2017
Posts: 958
WE: Supply Chain Management (Energy and Utilities)
Re: Need expert advice - Is 0 a perfect square on the GMAT?  [#permalink]

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13 Oct 2018, 19:52
1
gmat800live wrote:
Apologies for the weird question. I searched and saw other threads, but didn't see any response from experts etc.

Does the GMAT consider 0 to be a perfect square, cube etc? - Mainly concerned in case a DS question states "x is a perfect square" - Then I need to know if 0 can be considered or not.
Moreover, would -27 be a perfect cube? - And more generally, for "perfect cubes", can I consider negative numbers since sign is kept?

Thank you so much.

1) Zero is both a perfect square and a perfect cube.
2) -27 can be written as $$(-1)*27=(-1)^3*3^3$$; so cube root of -27=(-1)*3=-3. Hence , negative numbers could be perfect cubes.

Hope it helps.
_________________

Regards,

PKN

Rise above the storm, you will find the sunshine

Re: Need expert advice - Is 0 a perfect square on the GMAT?   [#permalink] 13 Oct 2018, 19:52
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