Interview puzzle 3

6

Chances of Having Same Birthday Problem 

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?


7

Well Known Sphinx Puzzle 

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travelers who passed by. If the traveler failed to solve the riddle, then the Sphinx killed him/her. And if the traveler answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.


8

Mathematical Riddle 

I know a three positive numbers that will results the same when
multiplied together
or
added together

Note : they are not fractional number.


9

IES Interview Riddle 

How many times do a clock's hands overlap in a day ?


10

World First Riddle 

World's most debatable question.

What came first, the egg or chicken ?