A king has 1000 bottles of wine and one has been poisoned. Even a sip of the poisoned wine is enough to kill a person.
The king asks the royal jailor to identify the poisoned wine bottle by testing them on the prisoners.
It takes up to 24 hours for the poison to take effect. There are unlimited number of prisoners at the jailer’s disposal. What is the minimum number of prisoners the jailer needs to identify the poisoned wine bottle in 24 hours?
Riddle AnswerYou have a set of 3 light switches outside a closed door. One of them controls the incandescent light bulb inside the room. With the door closed from outside the room, you can turn the light switches on or off as many times as you would like.
You can go into the room – one time only – to see the light. You cannot see whether the light is on or off from outside the room, nor can you change the light switches while inside the room.
No one else is in the room to help you. The room has no windows.
Based on the information above, how would you determine which of the three light switches controls the light inside the room?
Riddle AnswerYou 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 Answer“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 AnswerOnly one of the following statements is true, which one is it?