Mind Teasers : Heads Feet Mathematical Problem

Difficulty Popularity

In a stable there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable
category : MATHS

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Mind Teasers : Hard Logic Brain Teaser

Difficulty Popularity

There are 100 doors. 100 strangers have been gathered in the adjacent room. The first one goes and opens every door. The second one goes and shuts down all the even numbered doors – second, fourth, sixth... and so on. The third one goes and reverses the current position of every third door (third, sixth, ninth… and so on.) i.e. if the door is open, he shuts it and if the door is shut, he switches opens it. All the 100 strangers progresses in the similar fashion.

After the last person has done what he wanted, which doors will be left open and which ones will be shut at the end?
category : LOGIC

Mind Teasers : Crossing The River In Minimum Time Puzzle

Difficulty Popularity

Four people need to cross a dark river at night.

* They have only one torch and the river is too risky to cross without the torch.
* If all people cross simultaneously then torch light wont be sufficient.
* Speed of each person of crossing the river is different.cross time for each person is 1 min, 2 minutes, 7 minutes and 10 minutes.

What is the shortest time needed for all four of them to cross the river ?

Mind Teasers : Playing Cards Puzzle

Difficulty Popularity

I purchased five decks of card from the market and mixed them.
Now i have ( 5 * 52 = 260 cards).

What is minimum number of cards, i need to take out from the above 260 cards to guarantee at least one 'four of a kind'.
category : LOGIC

Mind Teasers : Interview Balls Puzzle

Difficulty Popularity

In a closed jar, there are three strawberry candies, two mango candies and five pineapple candies. You can't see inside the jar. Now, how many toffees you must take out from the jar to make sure that you have one of each flavor?
category : LOGIC

Mind Teasers : Three Magic Numbers Puzzle

Difficulty Popularity

Find three magic number such that ?

* Product of three numbers is prime.
* 2nd number - 1st number = 3rd number - 2nd number
category : LOGIC | MATHS

Mind Teasers : Short Story Mystery Puzzle

Difficulty Popularity

A Japanese ship was making its way through the Arabian Sea. The captain felt like taking a bath and thus went to the bathroom after removing his Rolex watch and gold bracelet. When he returned back from the bathroom, he found out that his valuables were missing.

He suspected five of his crew members. He called them in and asked all of them what they were doing for the last 15 minutes. They replied as follows:parachute
The French cook (with a butcher knife): I was in fridge room getting meat for cooking.
The German Engineer (with some tools in hand): I was working on the generator engine.
The Bangladeshi seaman (empty handed): I was on the mast correcting the flag which was upside down by mistake.
The American Radio officer (with his headphones in hand): I was messaging to company that we will reach the port in the next two days that is Friday morning at 1100 hrs.
The Indian navigation officer (empty handed): I was taking a nap before my night watch began.

Upon hearing all of them, the captain found out who was the thief. How did he know that? Who is the thief?
category : LOGIC | MYSTERY

Mind Teasers : Two Men One Question Puzzle

Difficulty Popularity

Imagine that you are travelling to a village. You happen to reach a point in the road where there is a fork. There are two ways that you can go into but only one amongst them is correct and leads to the village. You happen to see two men standing on the fork and you can ask them for the direction. To your bad luck, one amongst the two men always lies and the other one always says the truth. But you do not know who is a liar and who is not. At that point of the situation you are allowed to ask only one question to any one of the men standing there.

What question will you ask?
category : LOGIC

Mind Teasers : Floating Fish MatchStick Riddle

Difficulty Popularity

As shown in the image below, group of fishes are swimming from left to right. By moving just three matchsticks, can you make fishes from right to left?

Mind Teasers : Picture Brain Teaser

Difficulty Popularity

You can see the figure or draw one of your own. The scenario is as shown. There are three houses represented with the triangle over the square. There are three utilities: W, G and E representing water, gas and electricity respectively.

Can you draw a line and get each utility into every house (9) total lines without ever crossing any line?

category : LOGIC | PICTURE

Mind Teasers : Lateral Thinking Problem

Difficulty Popularity

Suppose there is a Christmas tree and four angels are sitting on it amidst the other ornaments. Two of them have black halos and two of them have white halos. No body among them can see above their head. Angel A is sitting on the top branch and can see angels B and C sitting below him. B can see C who is sitting in a branch lower than his. Angel D is at the base of the tree and can't be seen due to the branches in between. Also, he can't see anybody as well.

If they are asked to guess the color of their own halo (they dont know that), who do you think will be able to deduce and speak up first with a right answer?
category : LOGIC

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