The best long brain teasers to challenge your problem solving skills. How many brain teasers do you think you can answer correctly? Submit your own and challenge your friends.
Two men find an old gold coin and want to have a coin toss with it to decide who gets to keep it. The only problem is the coin is heavier on one side so it comes up heads more than tails.
What is a fair way for the men to toss the coin and decide who gets to keep it?
There is a room full of 100 politicians. Each one is either honest or a liar. You know to facts about these politicians:
1. At least one of them is honest.
2. If you pick any two politicians, at least one of them is a liar.
From this information, can you determine how many politicians are honest and how many are liars?
The exact same seven letters in the exact same order can fill in all the blanks in the following sentence and the sentence will make sense:
The _______ surgeon was _______ to do the surgery because he had _______ .
What are the seven letters?
There is valuable diamond inside of an empty wine bottle. The wine bottle is made of glass and has a cork sealing the top. You cannot break or damage the glass in any way. You are not allowed to take the cork out of the bottle.
If you can get the diamond out of the bottle, it is yours.
How do you get the diamond out without damaging the glass or removing the cork?
Mark went to a restaurant for dinner last night. When he received his check he paid with a hundred dollar bill.
When the waiter returned his change, Mark received one of every denomination of currency under one hundred dollars.
What was the total cost of Mark’s meal?
Placed above, I make greater things small. Placed beside I make small things great. In matters that count, I always come first. Where others increase I keep them the same.
What am I?
A wealthy man had an important flight the next day. Early that morning his security guard tells the man not to take the plane because he just had a dream that the plane would crash. The security guard then leaves as it is the end of his shift.
The wealthy man took the advice of his security guard and traveled by train instead. Once he arrives at his destination, he learns the plane did in fact crash. He then fires his security guard.
Why did he fire the security guard?
A man leaves home jogging, he turns left, he turns left again, then he turns left one last time, as he is looking home he sees two masked men.
What is he doing?
You have a fox, a chicken and a sack of grain. You must cross a river with only one of them at a time.
If you leave the fox with the chicken he will eat it; if you leave the chicken with the grain he will eat it.
How can you get all three across safely?
It is a Sunday morning and a man comes to find his wife dead.
The maid said she was cleaning the kitchen, the mailman said he was delivering mail, the nanny said he was teaching the kids, and the farmer said he was harvesting his crops.
Who done it?
In a lake, there is a patch of lily pads. Every day, the patch of lily pads doubles in size.
If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half the lake?
It’s 7:00 AM. You are asleep and there is a sudden knock on the door.
Behind the door are your parents who came to have breakfast. In your fridge are bread, milk, juice, and a jar of jam.
What will you open first?
You can have me but cannot hold me;
Gain me and quickly lose me.
If treated with care I can be great,
And if betrayed I will break.
What am I?
What is greater than God,
More evil than the devil,
The poor have it,
The rich need it,
And if you eat it, you’ll die?
I can bring tears to your eyes; resurrect the dead, make you smile, and reverse time.
I form in an instant but I can last a lifetime.
What am I?
We hurt without moving. We poison without touching. We bear the truth and the lies. We are not to be judged by our size.
What are we?
A man traveled to Europe over the summer and asked the same question several times a day everyday.
Usually he asked the question to different people but sometimes he asked the question to the same people in the same places. The man never got the same answer twice.
What was the question?
Adam says that Matt always lies.
Matt says that Roger always lies.
Roger says that Adam, as well as Matt, always lies.
Only one of them is telling the truth, who is it?
You have discovered a clue to open the door to a secret chamber said to be filled with riches awaiting those with the correct password.
The password is seven characters long and is a mixture of numbers and letters. Your clue is “You force heaven to be empty”.
What is the password to enter the secret chamber?
There are two boxes, box A and box B. Each box contains several balls.
If you move one ball from box A to box B, box B will then have twice as many balls as box A.
If you move one box from box B to box A, both boxes will then have the same amount of balls.
How many balls are in each box?
