The best hard 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?
I have a metal roof and a glass wall,
I burn and burn but never fall.
What am I?
I am flora, not fauna.
I am foliage, not trees.
I am shrubbery, not grass.
What am I?
If you throw me from the window, I’ll leave a grieving wife.
Bring me back, but a door, You’ll see something giving life.
What am I?
What would be the next letter in this series?
O T T F F S S
Always old, sometimes new.
Never sad, sometimes blue.
Never empty, sometimes full.
Never pushes, always pulls.
What am I?
What is the only number whose letters are in alphabetical order?
I’m teary-eyed but never cry. Silver-tongued, but never lie. Double-winged, but never fly. Air-cooled, but never dry.
What am I?
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?
We can hurt without moving. We can poison without touching. We can bear the truth and lies. We are not to be judged by our size.
What are we?
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?
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?
I do not speak unless spoken to, many have heard me but none have seen me.
What am I?
Which tire does not move when a car turns right?
If it’s information you seek, come and see me.
If it’s pairs of letters you need, I have consecutively three.
Who am I?
What do many boats, shovels, laundries, whistles, and hot showers have in common?
