RAS question
A cube has six faces painted with six different colours: Red, Blue, Green, Yellow, White, Black. Red is opposite to Green. Blue is adjacent to Red. White is opposite to Black. Which colour is opposite to Blue?
Correct answer: (B) Yellow.
In this cube arrangement, Yellow is opposite to Blue.
Explanation
A cube has six faces, which form three opposite pairs. The question already fixes two pairs: Red is opposite to Green, and White is opposite to Black. Blue is also stated to be adjacent to Red, so it cannot be opposite to Red; moreover, Green already occupies the face opposite Red. Once the Red-Green and White-Black pairs are fixed, only Blue and Yellow remain unpaired. Therefore, Blue and Yellow must form the third opposite pair. NCERT's Learning Outcomes at the Foundational Stage similarly emphasises recognising three-dimensional shapes, their observable properties, and spatial relationships such as top, bottom, above and below.
Why the other options are wrong
- (A) White is not the correct option because it is already fixed as the face opposite Black.
- (C) Black is not the correct option because it is already fixed as the face opposite White.
- (D) Green is not the correct option because it is already fixed as the face opposite Red.
Concept
This tests cube-based spatial reasoning: use the six-face structure and eliminate the opposite pairs that are already fixed. It fits Reasoning & Mental Ability because the answer depends on visualising adjacency and opposites rather than memorising a fact. Such questions recur in RAS because they require inferring how faces relate from limited information.