### Genius Puzzles:: Interview Brain Teasers Questions With Answers

Interview brain teasers question sallow you to enhance your analytical and problem solving abilities. These brain teasers help you to determine how well you can think through a query and calculate or determine a response or solve a problem without getting confused.It allows you to exercise your brains quickly and apply logic to it. It requires deep thinking and concentration along with a quick and spontaneous reaction. As it is a competitive world so we need to enhance our answering abilities in an interview.

Here are some of the challenging interview brain teasers we have for you

Here are some of the challenging interview brain teasers we have for you

**Interview Brain Teasers Questions #1 - Famous Egg Floor Riddle**

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Popularity Quotient

* You are given 2 eggs.

* You have access to a 100-story building.

* Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor.Both eggs are identical.

* You need to figure out the highest floor of a 100-story building an egg can be dropped without breaking.

* Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

* You have access to a 100-story building.

* Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor.Both eggs are identical.

* You need to figure out the highest floor of a 100-story building an egg can be dropped without breaking.

* Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

**Interview Brain Teasers Questions #2 - Most Popular Logical Puzzle**

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Outside a room there are three light switches. One of switch is connected to a light bulb inside the room.

Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb ??

Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb ??

**Interview Brain Teasers Questions #3 - Interview Marble Logic Puzzle**

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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.

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.

**Interview Brain Teasers Questions #4 - Crossing The River In Minimum Time Puzzle**

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Popularity Quotient

Four people need to cross a dark river at night.

* They have only one torch and the river is too risky to cross without the torch.

* If all people cross simultaneously then torch light wont be sufficient.

* Speed of each person of crossing the river is different.cross time for each person is 1 min, 2 minutes, 7 minutes and 10 minutes.

What is the shortest time needed for all four of them to cross the river ?

* They have only one torch and the river is too risky to cross without the torch.

* If all people cross simultaneously then torch light wont be sufficient.

* Speed of each person of crossing the river is different.cross time for each person is 1 min, 2 minutes, 7 minutes and 10 minutes.

What is the shortest time needed for all four of them to cross the river ?

**Interview Brain Teasers Questions #5 - Popular Interview Problem**

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I have two rectangular bars.

They have property such that when you light the fire from one end , it will take exactly 60 seconds to get completely burn.

However they do not burn at consistent speed (i.e it might be possible that 40 percent burn in 55 seconds and next 60 percent can burn in 10 seconds).

Problem is : How do you measure 45 seconds ?

They have property such that when you light the fire from one end , it will take exactly 60 seconds to get completely burn.

However they do not burn at consistent speed (i.e it might be possible that 40 percent burn in 55 seconds and next 60 percent can burn in 10 seconds).

Problem is : How do you measure 45 seconds ?

**Interview Brain Teasers Questions #6 - Infoedge Interview Aptitude Problem**

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On a magical-intellectual land of gpuzzles , all the animal are rational(real smart).

There are six leopards and one sheep.

Leopard can eat sheep but since as the land is magical, the leopards who eats the sheep , turns into sheep and then can be eaten by the remaining leopard(s).

If we leave them for some time then how many sheep and leopard will be there , when we come back ?

There are six leopards and one sheep.

Leopard can eat sheep but since as the land is magical, the leopards who eats the sheep , turns into sheep and then can be eaten by the remaining leopard(s).

If we leave them for some time then how many sheep and leopard will be there , when we come back ?

**Interview Brain Teasers Questions #7 - Famous Probability Puzzle**

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This is a famous probability puzzle in which you have to choose the correct answer at random from the four options below.

Can you tell us whats the probability of choosing correct answer in this random manner.

1) 1/4

2) 1/2

3) 1

4) 1/4

Can you tell us whats the probability of choosing correct answer in this random manner.

1) 1/4

2) 1/2

3) 1

4) 1/4

**Interview Brain Teasers Questions #8 - Fake Coin Brain Teaser**

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In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

**Interview Brain Teasers Questions #9 - Logic Fruits Riddle**

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There is a box full of fruits,

all but two are grapes,

all but two are apples,

and all but two are oranges.

How many fruits are in the box ?

all but two are grapes,

all but two are apples,

and all but two are oranges.

How many fruits are in the box ?

**Interview Brain Teasers Questions #10 - IAS Interview Problem**

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I need to divide numbers from 1 to 9 into two group such that sum of numbers in one group is equal to the sum of other group.

Note : 6 cannot be flipped over to make it 9.

Note : 6 cannot be flipped over to make it 9.