The right color

It was execution day in the kingdom of Ferristy. But also, by coincidence, it was a national holiday. Thus it was that the king decided to spare the life of one condemned man. He took three men who were to be killed and placed them in a circle facing each other. Then he blindfolded them. Next, he placed a daub of blue paint on the forehead of each. Finally, he said, “On the forehead of each of you I have placed a spot of either blue or yellow paint. At least one of the spots will be blue. I am now going to remove your blindfolds and let you look at the paint on each other’s foreheads. The first man to tell me what color I have placed on him will be freed. But it will not be advisable to guess. If you guess wrong I will have you tortured before you are killed.” He then removed the blindfolds. The prisoners looked at each other’s heads, and one cried, “My color is blue!” Can you tell what chain of logic he used to be fairly certain he had gotten the right color?

Click here for the solution

Lets call the man A. He reasoned that if his color were yellow, B would have promptly figured that his was blue. For if As had been yellow, B would know that C would rapidly call out, My color is blue! This is so because if C had seen yellow on both As and Bs heads, he would immediately know his was blue.

more riddles

Five-digit number

What is the five-digit number, no zeroes, in which the second digit is three times the first, the third is one more than the second, the fourth is four times the first, and the last is one-half more than the second? The number is: 26789 more...

read more

What was the code?

A thief enters a shop and threatens the clerk, forcing him to open the safe. The clerk says, "The code for the safe is different every day, and if you hurt me you'll never get the code". But the thief manages to guess the code on his own. How did he do it? The...

read more

How does the man escape?

A man is trapped in a room. The room has only two possible exits: two doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing...

read more

How many children does Mr. Smith have?

Mr. Smith has 4 daughters. Each of his daughters has a brother. How many children does Mr. Smith have? He has 5 children, all of the daughters have the same 1 brother. more riddlesDonec rutrum congue leo eget malesuada....

read more