Discussion

Suggestions

Difficulty Popularity

There is a box which have 33 yellow marbles and 35 green marbles. You also have 34 green marbles outside the box.

Randomly remove two marbles from the box.

* If they are of different colors, put the yellow one back in the box.

* If they are the same color, take them out and put a green marble back in the box.

Repeat this until only one marble remains in the box.

What is the color of the sole marble left in the box ?
**category** :
LOGIC

Randomly remove two marbles from the box.

* If they are of different colors, put the yellow one back in the box.

* If they are the same color, take them out and put a green marble back in the box.

Repeat this until only one marble remains in the box.

What is the color of the sole marble left in the box ?

Difficulty Popularity

Cindy throws a ball from a 90 feet building. The ball is quite bouncy and when it hits the ground, it bounces back half way up. It keeps bouncing back to half way up.

How many bounces will the ball take before it comes to a permanent halt?

How many bounces will the ball take before it comes to a permanent halt?

Difficulty Popularity

Eight Brothers lives in an old house where there is no electricity and no computers or any any other gadget.

Brother-1: Reading Comics

Brother-2: Playing Chess

Brother-3: Writing

Brother-4: making food for the family

Brother-5: sleeping and snoring

Brother-6: cleaning house

Brother-7: watering the plants

what is Brother-8 doing ?

Brother-1: Reading Comics

Brother-2: Playing Chess

Brother-3: Writing

Brother-4: making food for the family

Brother-5: sleeping and snoring

Brother-6: cleaning house

Brother-7: watering the plants

what is Brother-8 doing ?

Difficulty Popularity

Two trains under a controlled experiment begin at a speed of 100 mph in the opposite direction in a tunnel. A supersonic bee is left in the tunnel which can fly at a speed of 1000 mph. The tunnel is 200 miles long. When the trains start running on a constant speed of 100 mph, the supersonic bee starts flying from one train towards the other. As soon as the bee reaches the second train, it starts flying back towards the first train.

If the bee keeps flying to and fro in the tunnel till the trains collide, how much distance will it have covered in total?

If the bee keeps flying to and fro in the tunnel till the trains collide, how much distance will it have covered in total?

Difficulty Popularity

You are given a set of scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other.

The 12 marbles appear to be identical. In fact, 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more.

Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light.
**category** :
LOGIC

The 12 marbles appear to be identical. In fact, 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more.

Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light.

Difficulty Popularity

Armed robbers invaded a bank. They were busy looting when suddenly a phone rang. The phone happened to be at the reception. One of the robber asked the receptionist to attend the call and talk without giving away the situation. The call happen to be from her mother. She spoke, 'Do you have any emergency mom? Can you give me a call when I get home, I could really use your help in buying new curtains?' Then she hangs up.

The robbers are busy when the police arrives suddenly along with the mother of the receptionist. How did she know about the robbery?

The robbers are busy when the police arrives suddenly along with the mother of the receptionist. How did she know about the robbery?

Difficulty Popularity

Christanio Ronaldo is a strange liar.

He lies on six days of the week, but on the seventh day he always tells the truth.

He made the following statements on three successive days:

Day 1: 'I lie on Monday and Tuesday.'

Day 2: 'Today, it's Thursday, Saturday, or Sunday.'

Day 3: 'I lie on Wednesday and Friday.'

On which day does Christanio Ronaldo tell the truth?

He lies on six days of the week, but on the seventh day he always tells the truth.

He made the following statements on three successive days:

Day 1: 'I lie on Monday and Tuesday.'

Day 2: 'Today, it's Thursday, Saturday, or Sunday.'

Day 3: 'I lie on Wednesday and Friday.'

On which day does Christanio Ronaldo tell the truth?

Difficulty Popularity

Difficulty Popularity

Six identical glasses are in a row.

The first three glasses are filled with juice, and the last three glasses are empty.

By moving only one glass, can you arrange them so that the full and the empty glasses are alternate?
**category** :
LOGIC

The first three glasses are filled with juice, and the last three glasses are empty.

By moving only one glass, can you arrange them so that the full and the empty glasses are alternate?

Difficulty Popularity

22 February

I am always 1 to 6.

I am always 1...

21 February

Can you count the number of holes in the...

20 February

You have a glass of water and a glass of...

19 February

20 girls from NewJersey jumps into the e...

18 February

In which month people in Liverpool sleep...

17 February

Which superhero movie is hidden in the r...

16 February

A well-known chemist name from London wa...