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UPSC 2010: A cuboid has six sides of different colours. The red side is opposite to black. The blue side is adjacent to white. The brown side is adjacent to blue. The red side is face down. Which one of the following would be the opposite to brown?
(a)Red
(b)Black
(c)White
(d)Blue
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Not attemptedCorrect Answer: (c) White
With red fixed on the bottom and black opposite it on top, the four side faces remain. Placing blue on any side forces white on an adjacent side (by the clue) and brown on another side sharing an edge with blue. Whatever the exact arrangement, brown and white end up on opposite side-faces (since the only face opposite brown cannot share an edge with blue). Therefore white is opposite brown; red or black cannot be opposite because those faces are already paired, and blue cannot be opposite because brown must be adjacent to it.
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What is the correct answer to this UPSC 2010 Science & Technology question?▼
The correct answer is option (c): White. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Logical Reasoning & Puzzles question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2010, GS Paper 1, as Question 6. It falls under Science & Technology > Logical Reasoning & Puzzles.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Logical Reasoning & Puzzles?▼
UPSC has asked 71 questions from Logical Reasoning & Puzzles (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.