Length of the trip

George did not have a wristwatch, but he did have an accurate clock. However, he sometimes forgot to wind his clock. Once when this happened, George went to his sister’s house, spent the evening with her, went back home and set his clock. How could he do this without knowing beforehand the length of the trip?

Click here for the solution

When George left his house, he started the clock and wrote down the time it then showed. When he got to his sister’s house he noted the time when he arrived and the time when he left. He thus knew how long he was at his sister’s house. When he got back home, he looked at the clock, so he knew how long he had been away from home. Subtracting from this the time he had spent at his sister’s house, he knew how long the walk back and forth had been. By adding half of this to the time he left his sisters house, he then knew what time it really was now.

more riddles

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

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

The peanuts and the monkey

Five men checked into a hotel with a bag of peanuts and a monkey. They planned on dividing the peanuts evenly the following morning. However, during the night, one of the men got up, divided the peanuts into five equal parts, took his fifth and had one leftover peanut...

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