dse 2008 ques no. 20

[sunny2009]

suppose we have a chair with n legs and it stands with all its legs touching d floor,regardless of floor quality,
i.e. smoothness,evenness etc.
then what is the value of n?
how should we go ahead in such questions?

[aditi5000]

my method is NOT advisable but this is how i thought if it - pyramids are known to be the most solid structure because of the triangular base i.e. 3 sides. hence, 3 legged chair.

[Mr. Nobody]

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[sunny2009]

thank u aditi and ram...:)

[Ayushya Kaul]

Could anyone confirm the logic behind the answer given above?
Amit sir's answer key differs on this.

[Ankit]

These questions are mostly based on your presence of mind. Use elimination approach and be clear that the most obvious is also the least likely solution.

[Do bats eat cats?]

I think the 3 logic would work if the surface was a plane (as any three points can determine a plane). But the question states "regardless of floor quality", and that bit has thrown me off.