Logic Riddles

 
Popular
Daily Shuffle
New
Hard

65.8k views
69 ratings
7 saves

Question: There are 100 prisoners lining up to go to jail. Each prisoner is wearing a hat that is either black or white. The prisoners don't know their own hat color, just the hat color of those in front of them in line (the first prisoner in line can't see anyone's hat and the last prisoner can see everyone's hat except their own). Starting from the back, one of the guards asks each prisoner what color their hat is. If they are correct they get to go free but if they are wrong they go to jail.If the prisoners get to discuss a plan, how can at least 99 of them be saved?

Answer: The back prisoner will yell "black" if there is an odd number of black hats in front of him and "white" if there is an even number of black hats in front of him. The next prisoner will then count the number of black hats in front of him and if it was odd and is now even, or vice versa, then that person knows what color their hat is. The next person then knows their hat color based on what the people before them said and how many black hats are in front of them. In this way the front 99 prisoners will know their hat color and will be set free. The prisoner in the back who goes first has a 50 percent chance of being set free.

Share this:FacebookTwitterGoogle+

1k views
92 ratings
5 saves

By WesJayC

Question: If it takes three men two days to dig a hole, how long does it take one man to dig half of a hole?

Answer: You can't dig half of a hole, a hole's a hole. As soon as digging starts there is a hole, so there is also half a hole.

Share this:FacebookTwitterGoogle+

73.9k views
76 ratings
2 saves

Question: There are two ropes that both take exactly 1 hour to burn from end to end. You are unable to cut the rope. How can you burn the two ropes in a total of 45 minutes?

Answer: Start one of the ropes on fire from both ends and the other one from one end. After a half an hour one rope will be completely burnt and the other will be half burnt. At this point you light the final rope from the unlit side and it will take 15 minutes for the remaining half of the rope to burn, for a total of 45 minutes.

Share this:FacebookTwitterGoogle+

1k views
113 ratings
1 saves

Question: Two children are born in the same hospital, on the same year, on the same day, and have the same father and mother. But they are not twins.

How is this possible?

Answer: They are triplets (or quadruplets, etc.)

Share this:FacebookTwitterGoogle+

1k views
91 ratings
2 saves

Question: If a farmer has 5 chickens, two horses, and a wife.

How many feet are on his farm?

Answer: Just four. His wife has two feet, he has two feet, each chicken has two claws, each horse has four hoofs.

Share this:FacebookTwitterGoogle+

Submit Your Riddle

Follow Us

Follow us and get the Riddle of the Day, Joke of the Day, and interesting updates.

Advertise with us!

© 2013-2014 Good Riddles Now. All rights reserved.

FacebookTwitterGoogle+RSS Feed