Question

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 would be the opposite of brown?

Answer 1

White

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Blue side has red and black (from top and bottom), brown an white side adjacent.
Black and red are opposite,
blue and the remaining color side are opposite,
so brown and white are opposite.