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# Puzzle Archives :: Interview Puzzles

#### Co. Cloud

Interview Puzzles Practice Set 15

• Question :: 1

A drinks machine offers three selections - Tea, Coffee or Random (Either tea or Coffee)but the machine has been wired up wrongly so that each button does not give what it claims. If each drink costs 50p, how much minimum money do you have to put into the machine to find out which button gives which selection?

No Best Answer on this question yet!

Not Yet Asked in Any of the Companies

• Question :: 2

Consider a chessboard with a single Rook. A Rook can move any number of square sideways/forward, but not diagonally.What is the minimum number of moves the Rook needs to make, in order to pass over all the squares on the chessboard and return
to the original position?

Note: Take any square as a starting position for the Rook.

No Best Answer on this question yet!

Not Yet Asked in Any of the Companies

• Question :: 3

There are N secret agents each knows a different piece of secret information. They can telephone each other and exchange all the information they know. After the telephone call, they both know anything that either of them knew before the call. What is the minimum number of telephone calls needed so that all of them know everything?

No Best Answer on this question yet!

• Question :: 4

Two boys want to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross the river using the boat. How they manage to cross?

No Best Answer on this question yet!

• Question :: 5

A blindfolded man is asked to sit in the front of a carrom board. The holes of the board are shut with lids in random order, i.e. any number of all the four holes can be shut or open. Now the man is supposed to touch any two holes at a time and can do the following.

* Open the closed hole.

* Close the open hole.

* Let the hole be as it is.

After he has done it, the carrom board is rotated and again brought to some position. The man is again not aware of what are the holes which are open or closed. How many minimum numbers of turns does the blindfolded man require to either open all the holes or close all the holes? Note that whenever all the holes are either open or close, there will be an alarm so that the blindfolded man will know that he has won!!!!!

No Best Answer on this question yet!

Not Yet Asked in Any of the Companies

Puzzle test enable the companies to check the Logical skills of a candidate. Check out these Puzzle topics with answers for the interview! You can choose a topic and speak up your mind through a Gmail type editor.