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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
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89% (00:40) correct
11%
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The cube above has a number on each of its six faces. If the sum of the numbers on each pair of opposite faces is 10, what is the sum of the numbers on the faces not shown?
(A) 8
(B) 10
(C) 12
(D) 14
(E) 16
Attachment:
2017-12-07_0955_001.png [ 7.82 KiB | Viewed 2800 times ]
07 Dec 2017, 12:39
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Since the total sum of each pair is equal to 10 each, the sum must be 30.
The three faces, which we are able to see have a sum of 2+4+8 = 14.
Hence, the three invisible faces will have a sum of 30 - 14 = 16(Option E)
P.S the three invisible faces are opposite to the faces that are displayed.
07 Dec 2017, 13:08
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E :16
As it is nowhere mentioned that a number can be used only once, so the face opposite to 2will have 8, face opposite to 4 will have 6 and the face opposite to 8 will have 2
Total - 8+6+2= 16
Sent from my vivo 1609 using GMAT Club Forum mobile app
As it is nowhere mentioned that a number can be used only once, so the face opposite to 2will have 8, face opposite to 4 will have 6 and the face opposite to 8 will have 2
Total - 8+6+2= 16
Sent from my vivo 1609 using GMAT Club Forum mobile app
