A cube has its faces painted red, blue, green, yellow, white and black — one colour per face, opposite faces always differing. If red is opposite blue, and green is opposite yellow, which colour is opposite black?
- A.Red
- B.Green
- C.White ✓
- D.Yellow
Explanation: The three pairs are Red-Blue, Green-Yellow, and the remaining two, Black and White, must be the last pair.
Class 6 IMO Mathematics Olympiad practice · Visual & Spatial Reasoning · Mirror Images, Folding & Cubes
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