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What percent of the total surface area of cube A is black? (1) Exactl

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What percent of the total surface area of cube A is black? (1) Exactl  [#permalink]

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New post 27 Aug 2018, 06:51
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A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

79% (00:43) correct 21% (00:54) wrong based on 29 sessions

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Re: What percent of the total surface area of cube A is black? (1) Exactl  [#permalink]

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New post 27 Aug 2018, 07:51
Bunuel wrote:
What percent of the total surface area of cube A is black?

(1) Exactly two faces of cube A are entirely green.
(2) Exactly four faces of cube A contain black, and each face is exactly 1/4 black.


Question: What percent of the total surface area of cube A is black?

Statement 1: Exactly two faces of cube A are entirely green.

But we don't know how many faces are black hence

NOT SUFFICIENT

Statement 2: Exactly four faces of cube A contain black, and each face is exactly 1/4 black.

Total Faces = 6

Black part of faces = 4*(1/4) = 1 Face

Total Black% = 1/6 = 16.67%

SUFFICIENT

Answer: option B
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Re: What percent of the total surface area of cube A is black? (1) Exactl   [#permalink] 27 Aug 2018, 07:51
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