Brain Teasers & Puzzles

There is a building of 100 floors
If an egg drops from the Nth floor or above it will break.
If it’s dropped from any floor below, it will not break.
You’re given 2 eggs.
Find NHow many drops you need to make?
What strategy should you adopt to minimize the number egg drops it takes to find the solution?View SolutionSubmit Solution 940.1K views
 15 answers
 3 votes

In a country where everyone wants a boy, each family continues having babies till they have a boy. After some time, what is the proportion of boys to girls in the country? (Assuming probability of having a boy or a girl is the same)
View SolutionSubmit Solution 856.8K views
 5 answers
 3 votes

A devotee goes to three temples, temple1, temple2 and temple3 one after the other.
In front of each temple, there is a small pool. So while going to each temple
he takes some flowers with him and takes holy bath in a pool belongs to that temple.
If he takes a bath in one pool the flowers which he had earlier get doubled.One day the devotee goes to a temple1 with flowers and takes a bath in a pool and the
flowers get doubled. He keeps some flowers for god and move to temple2
along flowers he left with. Again takes a bath in a pool, flowers get doubled and keeps
the same number of flowers which he has kept in temple1. Again the same procedure continues in temple3 where he keeps the flowers which he has kept in temple1 and
temple2 and comes out with empty hands (no flowers left out).1. What are the initial number of flowers the devotee had?
2. How many flowers did he keep in each temple?View SolutionSubmit Solution 765.0K views
 2 answers
 3 votes

There is a perfectly accurate analog watch with hour, minute, and second hands.
How many times a day do all three hands overlap?
View SolutionSubmit Solution 762.6K views
 4 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.
View SolutionSubmit Solution 749.2K 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 halfanhour.
** This was the most tricky, diplomatic and mindmanipulating question asked at one of the interviews conducted by Google for a highly paid job.View SolutionSubmit Solution 742.6K views
 1 answers
 3 votes
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