• Views : 40k+
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Mind Teasers : Toughest Long Logic Puzzle

Difficulty Popularity

The puzzle question is : On Bagshot Island, there is an airport. The airport is the home-base of an unlimited number of identical airplanes. Each airplane has a fuel capacity to allow it to fly exactly 1/2 way around the world, along a great circle. The planes have the ability to refuel in flight without loss of speed or spillage of fuel. Though the fuel is unlimited, the island is the only source of fuel.
What is the fewest number of aircraft necessary to get one plane all the way around the world assuming that all of the aircraft must return safely to the airport? How did you get to your answer?
Notes:
(a) Each airplane must depart and return to the same airport, and that is the only airport they can land and refuel on ground.
(b) Each airplane must have enough fuel to return to airport.
(c) The time and fuel consumption of refueling can be ignored. (so we can also assume that one airplane can refuel more than one airplanes in air at the same time.)
(d) The amount of fuel airplanes carrying can be zero as long as the other airplane is refueling these airplanes. What is the fewest number of airplanes and number of tanks of fuel needed to accomplish this work? (we only need airplane to go around the world)

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  • Views : 70k+
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Mind Teasers : Three Errors In Sentence Problem

Difficulty Popularity

Can you fynd three errors in that puzzle?

By Admin
  • Views : 40k+
  • Sol Viewed : 10k+

Mind Teasers : Save Death Penalty Brain Teaser

Difficulty Popularity

A man committed a felony. As per the rules of the empire, the king decided to sentence him to death. However, he gave the man a choice; a choice to decide which way he wanted to die.

The man was quite smart and he said something, which saved him from his death. What do you think he must have said?

By Admin
  • Views : 40k+
  • Sol Viewed : 10k+

Mind Teasers : Trick Relationship Riddle

Difficulty Popularity

If Erica's daughter is my daughter's mom, who am I to Erica?

  • Views : 40k+
  • Sol Viewed : 10k+

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?

  • Views : 90k+
  • Sol Viewed : 30k+

Mind Teasers : Red | Blue | White Logical Riddle

Difficulty Popularity

At a restaurant downtown, Mr. Red, Mr. Blue, and Mr. White meet for lunch. Under their coats they are wearing either a red, blue, or white shirt.Mr. Blue says, 'Hey, did you notice we are all wearing different colored shirts from our names?' The man wearing the white shirt says, 'Wow, Mr. Blue, that's right!'
Can you tell who is wearing what color shirt?

  • Views : 50k+
  • Sol Viewed : 20k+

Mind Teasers : Hard Chess Puzzle Problem

Difficulty Popularity

Your pieces are white.
You need to win in half a move.

How can you do this ?


  • Views : 80k+
  • Sol Viewed : 20k+

Mind Teasers : Numbers For Buildings Problem

Difficulty Popularity

My town contains 100 buildings.
They are numbered from 1 to 100. How many 6's are used in these numbers ?

  • Views : 70k+
  • Sol Viewed : 20k+

Mind Teasers : Logical Cut Brain Teaser Riddle

Difficulty Popularity

Your friends are coming over to your birthday party. Your mum has bought this delicious giant doughnut for you guys. Unfortunately she had to go somewhere. Now you have to serve all of them including you.

There are a total of nine kids including you. None of you would mind a smaller piece. Can you cut this doughnut into nine pieces in just three straight cuts?

By Admin
  • Views : 50k+
  • Sol Viewed : 20k+

Mind Teasers : Logical Triplets Statement Riddle

Difficulty Popularity

You know three triplets: Eden Thorgan and Kylian.
Eden always tells the truth while Thorgan and Kylian always lie.
Kylian needs to return you 100$. You meet one of them on London streets and can ask him one three word question.

Which question, will you ask and why?

  • Views : 60k+
  • Sol Viewed : 20k+

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?

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