You are standing in a hallway next to 3 light switches that have been switched off. There is another room down the hallway with 3 light bulbs – all are incandescent light bulbs and each light bulb is operated by one of the switches in the hallway.
The door to the room is closed and you cannot see the light bulbs from the hallway.
How would you figure out which switch operates which light bulb, if you can enter the room with the light bulbs only once?
Riddle AnswerOnly one of the following statements is true, which one is it?
“Every day at noon,” Lucas said, “a ship leaves Le Havre for New York and another ship leaves New York for Le Havre. The trip lasts 7 days and 7 nights. How many New York-Le Havre ships will the ship leaving Le Havre today meet during its journey to New York?
Riddle AnswerThere are seven thieves. They stole diamonds from a diamond merchant and ran away. While running, night sets in and they decide to rest in the jungle.
When everybody was sleeping, two of them woke up and decided to divide the diamonds equally among themselves. But when they divided the diamonds equally, one diamond is left.
So they woke up the 3rd thief and tried to divide the diamonds equally again but still one diamond was left. Then they woke up the 4th thief to divide the diamonds equally again, and again one diamond was left. This happened with the 5th and 6th thief – one diamond was still left.
Finally, they woke up the 7th thief and this time the diamonds were divided equally.
How many diamonds did they steal in total?
Riddle AnswerThere are twenty-six coins lying on a table in a totally dark room. Ten are heads and sixteen are tails. In the dark, you cannot feel or see if a coin is heads up or tails up.
Your task is to separate the coins into two groups so that each group has the same number of coins heads up as the other group. You may move or flip the coins. How can you accomplish this? No tricks are involved.
Riddle Answer