A cuboid has six sides of different colours. The red side is opposite to…
2022
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 opposite to brown?
- A.
Red
- B.
Black
- C.
White
- D.
Blue
Attempted by 57 students.
Show answer & explanation
Correct answer: C
Step 1: Place the red face down.
Since the red face is opposite the black face, black is on top.
Step 2: Consider the four side faces (the faces around the ring between top and bottom).
Blue is adjacent to white and also adjacent to brown, so white and brown are the two faces next to blue in that side ring.
In that ring of four side faces, the face opposite any given side face is the one two positions away around the ring. If white and brown are the two faces adjacent to blue, they lie opposite each other.
Conclusion: White is opposite brown.