Mind Teasers : Chemistry Lab Riddle

Difficulty Popularity

Dalton was working in his chemistry lab and created a mixture whose weight is contributed by 90% water and 10% Carbon. The weight of the mixture is 20pounds. As he just finished creating the mixture, Dalton needs to go urgently for some urgent work for 2days. When he returned, the weight of water in the mixture was reduced from 90% to 50%.

How much does the mixture weigh now?

category : SCIENCE

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Mind Teasers : Hard Ten Boxes Interview Puzzle

Difficulty Popularity

You have ten boxes and an electronic weighing machine. In those ten boxes, you have chocolates. Each chocolate weigh 20 grams. But in one box the chocolates are defective and each weigh 19 grams exactly.

Now you can weigh in the electronic weighing machine but you can use that machine just once. How will you find out which box has the defected chocolates.
category : LOGIC

Mind Teasers : Math Trick Riddle

Difficulty Popularity

Removing one from eleven makes it ten and removing one from nine makes it ten.

Is it even possible?

Mind Teasers : Math Brain Teaser High School

Difficulty Popularity

There are two natural numbers whose sum is less than hundred and both of them are greater than one. Two friends Leena and Nadia knows the product and sum of the numbers respectively.

Both of them are exchanging the following statements:

Leena: I don’t know the numbers.
Nadia: "I knew you wouldn't be. I am not aware myself."
Leena: "Now I am sure I know the numbers!"
Nadia: "Now I am sure I know the numbers too!"

Can you find the two numbers?
category : LOGIC | MATHS

Mind Teasers : Terrorist Plane Hijack Puzzle

Difficulty Popularity

A terrorist hijacks a plane with 10 passengers and there is lots of gold in the plane.
After talking the gold , he asked the government officials for 11 parachutes.
He killed all the passenger so that no one can identify him , take one parachute and jumps off.

Was he stupid to ask for 11
parachutes if he need only one ?

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 : Hidden Bird In Snow Picture Riddle

Difficulty Popularity

Can you find the hidden bird in the picture (winter time) below?

category : PICTURE

Mind Teasers : Murder Mystery Puzzle

Difficulty Popularity

One evening there was a murder in the home of married couple, their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime.

The other one helped the murderer.

These are the things we know for sure:

1. The witness and the one who helped the murderer were not of the same sex.

2. The oldest person and the witness were not of the same sex.

3. The youngest person and the victim were not of the same sex.

4. The one who helped the murderer was older than the victim.

5. The father was the oldest member of the family.

6. The murderer was not the youngest member of the family.

Who was the murderer?

category : LOGIC | MYSTERY

Mind Teasers : Popular Logic Brain Teaser

Difficulty Popularity

A girl liked to collect money in a piggy bank. She bought pink colored piggy bank when she was 10 years old. She put $250 in the box on each of her birthday. Her younger sister took $50 out of her piggy bank on her birthday. The girl died when she was 50 years old due to an incurable disease.

When the piggy bank was opened, it had just $500. How can that be possible?
category : LOGIC | MATHS

Mind Teasers : 2 Golfer Sports Puzzle

Difficulty Popularity

Tiger Woods and Phil Mickelson are well-known golf rivals. One Day during a match, they were level at a score of 30. Phil hit a bad shot and Tiger added 10 to his score. Tiger then hit an awesome shot and he won the game.

How ?

category : LOGIC

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

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