Difficulty Popularity

Briana possess three boxes that vary in sizes. One is large, one is medium and one is small. She places 11 large boxes on her bed. Then, she places 8 medium sized boxes in some and leave some empty. Now she puts 8 small boxes in some of the medium ones and leave the others empty. The small boxes are all empty and now she 102 out of all the boxes on the bed are empty.

How many boxes did Briana used?

How many boxes did Briana used?

Difficulty Popularity

An alien force has invaded the realms of the earth. All they plan is the destruction of the entire planet. However, they have given humans a chance. They picks up ten intelligent most humans (you are one of them) and take them in a pitch black room. There is nothing you can see in the total darkness. The aliens place a hat on every human. The hats are of two colors - pink and green. After they place all the hats, the lights are turned on.

You are not allowed to see your own hat. The circulation of the hat is totally random with any kind of possible combination. The aliens start from the back and ask, "What is the color of hat you are wearing?" Everyone is allowed to hear the answer. If he gives the correct answer, he will be allowed to live and save the people but if he gives the wrong answer, he will be killed mercilessly and the people you represent will be killed.

What will you do to save as many lives as you can?

You are not allowed to see your own hat. The circulation of the hat is totally random with any kind of possible combination. The aliens start from the back and ask, "What is the color of hat you are wearing?" Everyone is allowed to hear the answer. If he gives the correct answer, he will be allowed to live and save the people but if he gives the wrong answer, he will be killed mercilessly and the people you represent will be killed.

What will you do to save as many lives as you can?

Difficulty Popularity

Hundred most brilliant logicians are handpicked from the world and invited to a room. But before they could enter, they are told that at least one of them has a black forehead. Whenever anyone can frame out that he is having a black forehead, he needs to leave the room when the lights are turned off. After that, the lights are turned back on and those who could infer that their forehead was black have left the room.

What happens if they have painted every forehead black?

What happens if they have painted every forehead black?

Difficulty Popularity

There is an equilateral triangle and three bugs are sitting on the three corners of the triangle. Each of the bugs picks up a random direction and starts walking along the edge of the equilateral triangle. What is the probability that none of the bugs crash into each other?

Difficulty Popularity

A new company has launched a range of juicy candies. There are two flavors of which these juice candies will be available for retail - Peach and Grape. The toffees are packed in three different boxes with one containing peach candies, one containing grape candies and one containing a mixture of both. It is informed that the packaging person has accidentally mislabeled all the three boxes.

If you are asked to label them correctly, how many candies will you have to pick and from which jar in order to label every box correctly?

If you are asked to label them correctly, how many candies will you have to pick and from which jar in order to label every box correctly?

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