• Brain Teasers & Puzzles

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• 3 + 3 = 3
5 + 4 = 4
1 + 0 = 3
2 + 3 = 4
3 + 4 = 5
1 + 7 = ?

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• 1,036.9K views
• 3 answers
• 7 votes

• There are 10 stacks of 10 coins each.
Each coin weights 10 gms. However, one stack of coins is defective and each coin in that stack weights only 9 gms.

What is the minimum number of weights you need to take to find which stack is defective? How?

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• 1,159.0K views
• 1 answers
• 4 votes

• Which clock works best?

The one that loses a minute a day or the one that doesn’t work at all?

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neha Genius
• 1,125.3K views
• 3 answers
• 4 votes

• Paul, Sam and Dean are assigned the task of figuring out two numbers. They get the following information:

Both numbers are integers between (including) 1 and 1000

Both numbers may also be identical.

Paul is told the product of the two numbers, Sam the sum and Dean the difference. After receiving their number, the following conversation takes place:
Paul: I do not know the two numbers.
Sam: You did not have to tell me that, I already knew that.
Paul: Then I now know the two numbers.
Sam: I also know them.
Dean: I do not know the two numbers. I can only guess one which may probably be correct but I am not sure.
Paul: I know which one you are assuming but it is incorrect.
Dean: Ok, I also know the two numbers.

What are the two numbers?

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• 998.0K views
• 1 answers
• 4 votes

• Five  puzzleFry ship’s pirates have obtained 100 gold coins and have to divide up the loot. The pirates are all extremely intelligent, treacherous and selfish (especially the captain).

The captain always proposes a distribution of the loot. All pirates vote on the proposal, and if half the crew or more go “Aye”, the loot is divided as proposed, as no pirate would be willing to take on the captain without superior force on their side.

If the captain fails to obtain support of at least half his crew (which includes himself), he faces a mutiny, and all pirates will turn against him and make him walk the plank. The pirates start over again with the next senior pirate as captain.

What is the maximum number of coins the captain can keep without risking his life?

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ravi Expert
• 1,254.1K views
• 7 answers
• 3 votes

• Four days are there which start with the letter ‘T‘.
I can remember only two of them as “Tuesday , Thursday”.

Can you tell rest two ?

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• 1,132.7K views
• 7 answers
• 3 votes

• Two fathers took their sons to a fruit stall.
Each man and son bought an apple, But when they returned home, they had only 3 apples.

They did not eat, lost, or thrown.
How could this be possible?

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• 1,130.0K views
• 1 answers
• 3 votes

• A farmer is taking her eggs to the market in a cart, but she hits a  pothole, which knocks over all the containers of eggs.  Though she is  unhurt, every egg is broken.
So she goes to her insurance agent, who  asks her how many eggs she had.  She says she doesn’t know, but she  remembers something from various ways she tried packing the eggs.

When she put the eggs in groups of two, three, four, five, and six  there was one egg left over, but when she put them in groups of seven  they ended up in complete groups with no eggs left over.

What can the farmer and agent figure out from this information about the number of  eggs she had ?

Is there more than one answer ?

PS:- Though I know the answer but still I want the answer in the simplest understandable manner possible. Thanks for all answers in advance.

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• 1,125.3K views
• 2 answers
• 3 votes

• Let it be simple and as direct as possible.

Interviewer : Tell me how much time (in days) and money would you require to clean all the glasses of each and every building (which is obviously composed of glasses) of New York City including all the glasses at the top as well as at the bottom of all buildings. Also mention the calculations for your contract and the money you would mostly prefer to accomplish this task. Most importantly you and only you have to do this job (i.e. you can’t ask anyone else to clean the glasses for you). You can even separately mention the costing of cleaning the window glasses and fixed glasses from both the sides (i.e. from inside as well as outside.)

* Time allotted for the question (to think and analyse) is half-an-hour.
** This was the most tricky, diplomatic and mind-manipulating question asked at one of the interviews conducted by Google for a highly paid job.

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• 1,114.9K views
• 1 answers
• 3 votes

• Solve this logic sequence puzzle by the correct digit-

8080 = 6

1357 = 0

2022 = 1

1999 = 3

6666 = ?
Hint – Its not a mathematical arithmetic 😛

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• 1,113.7K views
• 2 answers
• 3 votes

• More puzzles to try-

• What is the logic behind these ?

3 + 3 = 3 5 + 4 = 4 1 + 0 = 3 2 + 3 = 4 ...Read More »
• Defective stack of coins puzzle

There are 10 stacks of 10 coins each. Each coin weights 10 gms. However, one stack of coins is defective ...Read More »
• Which clock works best?

Which clock works best? The one that loses a minute a day or the one that doesn’t work at all?Read More »
• (Advanced) Cheryl’s Birthday Puzzle

Paul, Sam and Dean are assigned the task of figuring out two numbers. They get the following information: Both numbers ...Read More »
• Five greedy pirates and gold coin distribution Puzzle

Five  puzzleFry ship’s pirates have obtained 100 gold coins and have to divide up the loot. The pirates are all ...Read More »
• Tuesday, Thursday what are other two days staring with T?

Four days are there which start with the letter ‘T‘. I can remember only two of them as “Tuesday , Thursday”. ...Read More »
• How could only 3 apples left

Two fathers took their sons to a fruit stall. Each man and son bought an apple, But when they returned ...Read More »
• How Many Eggs ?

A farmer is taking her eggs to the market in a cart, but she hits a  pothole, which knocks over ...Read More »
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Solve this logic sequence puzzle by the correct digit- 8080 = 6 1357 = 0 2022 = 1 1999 = ...Read More »
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