top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

How can you be sure to find the car with the good engine?

0 votes
191 views

One evening you are sitting in a room with no windows and the door shut. Suddenly you hear two cars drive up outside. From the noise of the engines you can make out that one car's engine is well tuned, whereas the other car's engine is in urgent need of repair. The engines are switched off and you are asked to go out and identify the car with the good engine. You are allowed to start only one engine to hear the noise. However, when you get outside, you find 3 cars. You are told that one of them was already there for a long time.
How can you be sure to find the car with the good engine?

posted Sep 4, 2015 by Pardeep Kohli

Share this puzzle
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

Touch the engine which is cold, you will know the other two car which just arrived. Then start one of them to fine out the defective one.

answer Sep 4, 2015 by Ramana V Sista



Similar Puzzles
0 votes

It’s midnight and there is power failure. You have twenty two green socks and thirty five purple socks in your dresser drawer. How many socks do you have to take out to be sure of having a pair that matches.

0 votes

A man has 53 socks in his drawer. They are 21 identical blue, 15 identical black and 17 identical red. The light went off and he is in complete darkness. How many socks must he take out to be 100% certain that he has a pair of black socks?

0 votes

Chetan knew when he saw the semi swerve that his car was going to be completely demolished. He got out of the car crash completely unharmed. How did he do this?

0 votes

John wants to send a letter to Peter, who lives on Tesla Street.
John doesn't remember the house number. However, he knows that it has 4 digits, it is a multiple of 5 and 7 and that the last digit is 0. What is the minimum number of letters that John has to send to be sure that Peter receives his letter?

...