Not only our technical knowledge helps,
but also the presence of mind and the right answer at right time.
Even if u don't know the answer for a question just confuse the questioner

Question and the Answer given by Candidates, oh sorry, they are IAS Officers now.

Q.How can you drop a raw egg onto a concrete floor
without cracking it?
A. Concrete floors are very hard to crack! (UPSC Topper)

Q.If it took eight men ten hours to build a wall, how
long would it take four men to build it?
A. No time at all it is already built. (UPSC 23 rd Rank Opted for IFS)

Q.If you had three apples and four oranges in one hand
and four apples and three oranges in the other hand, what would you have?
A. Very large hands.(Good one) (UPSC 11 Rank Opted for IPS)

Q. How can you lift an elephant with one hand?
A. It is not a problem, since you will never find an elephant with one hand.
(UPSC Rank 14 Opted for IES)

Q. How can a man go eight days without sleep?
A. No Probs, He sleeps at night. (UPSC IAS Rank 9

Q. If you throw a red stone into the blue sea what it will become?
A. It will become Wet or Sink as simple as that. (UPSC IAS Rank 2)

Q. What looks like half apple?
A : The other half. (UPSC - IAS Topper )

Q. What can you never eat for breakfast?
A : Dinner.

Q. What happened when wheel was invented?
A : It caused a revolution.

Q. Bay of Bengal is in which state?
A : Liquid State(UPSC 33Rank )