Mind Teasers : Logic Coins Puzzle

Difficulty Popularity

Assuming i have an infinite supply of coins.

What is the fewest number of coins would be required in order to make sure each and every coin touched exactly three other coins.

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Mind Teasers : Spatial Trivia Physics Puzzle

Difficulty Popularity

As shown in picture, there are four gears with the following specification
* Gear A has 60 teeth
* Gear B has 40 teeth
* Gear C has 20 teeth
* Gear D has 60 teeth
* Every minute, Gear B makes 15 complete turns.

What is the relative speed of Gear A and Gear B?

Mind Teasers : Hard Logic Statement Riddle

Difficulty Popularity

There are a hundred statements.
1st person says: At least one of the statements is incorrect.
2nd person says: At least two of the statements is incorrect.
3rd person says: At least three of the statements are incorrect.
4th person says: At least four of the statements are incorrect.
..
..
..
100th person says: At least a hundred of the statements are incorrect.

Now analyze all the statements and find out how many of them are incorrect and how many are true?

Mind Teasers : Be Detective And Find The Thief Puzzle

Difficulty Popularity

You need to be a detective and need to find the thief in the puzzle below?

category : MYSTERY | PICTURE

Mind Teasers : Trick Interesting Maths puzzle

Difficulty Popularity

There are three cars in a racing track. The track is made forming a perfect circle and is quite wide so that at one time, multiple cars can pass through it. The car which is leading is driving at 55 MPH and the slowest car is driving at 45 MPH. The car that is in middle of these two is driving in between the two speeds. For the time being you can say that the distance between the fastest car and the middle car is x miles and it is same between the middle car and the slowest car. Also, x is not equal to 0 or 1.

The car keeps running till the leading car catches up with the slowest car and then every car stops. Given the case, do you think that at any point, the distance between any two pairs will again become x miles?

Mind Teasers : Solve Magic Square Riddle

Difficulty Popularity

You have to place all the digits from 1 to 9 without repeating any number in a tic tac toe board. The condition is that the numbers should add up to 15 whether you add the numbers in each row, column or diagonally.

Can you do it?
category : LOGIC

Mind Teasers : What Do you See - Brick Optical Illusion Riddle

Difficulty Popularity

What except brick can you see in the picture below?

category : PICTURE

Mind Teasers : Awesome Logic Problem

Difficulty Popularity

I went for an official tour in a big city where there are over 100 buildings.
Building-1 is named first building.
Building-2 is named second building.
Building-3 is named third building.

A visitors decides to walk through all the buildings, he finds all the buildings except building-62.
Visitor later founds that the local of the city have given it another name.

What is the name of the Building ?
category : LOGIC | TRICK

Mind Teasers : James Bond - Mini Mystery Story Riddle

Difficulty Popularity

James Bond was relaxing in his hotel room in Lyon when he heard a knock at his door. Bond opened the door and see a beautiful woman whom he had never seen in his life. She said that she is so sorry and she thought that this was her room. She was about to leave the room when the Bond takes out his pistol and ask the girl to stop.

What made Bond suspicious of the girl?

category : MYSTERY | STORY

Mind Teasers : Hard Logical Puzzle

Difficulty Popularity

You are the ruler of a medieval empire and you are about to have a celebration tomorrow. The celebration is the most important party you have ever hosted. You've got 1000 bottles of wine you were planning to open for the celebration, but you find out that one of them is poisoned.

The poison exhibits no symptoms until death. Death occurs within ten to twenty hours after consuming even the minutest amount of poison.

You have over a thousand slaves at your disposal and just under 24 hours to determine which single bottle is poisoned.

You have a handful of prisoners about to be executed, and it would mar your celebration to have anyone else killed.

What is the smallest number of prisoners you must have to drink from the bottles to be absolutely sure to find the poisoned bottle within 24 hours?
category : LOGIC

Mind Teasers : Famous Elevator Riddle

Difficulty Popularity

Tanu lives on the 13th floor takes the elevator down to the ground floor every morning and goes to her office.

In the evening, when she comes back on a rainy day , or if there are other people around in the elevator, she goes to her 13th floor directly. Otherwise, she goes to the 1oth floor and walks up three flights of stairs to his apartment.

Whats the reason for her unusual behavior ?
category : LOGIC | MYSTERY

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