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McKinsey & Company Puzzles have been brought to you by GPuzzles.Com. The idea behind this post is to prepare students for theInterview Questions in McKinsey & Company.

A Basic info about the company:
McKinsey & Company, Inc. is an American international management consulting firm that emphases on resolving issues of apprehension to senior management. The corporation serves as a consultant to businesses, governments, and institutions around the world. McKinsey is extensively considered to be the most esteemed management consulting firm in the world. As of September 2013, over 100 McKinsey offices exist in 60 countries.

The following McKinsey & Company Interview Puzzles will help you enhance your skills and will offer you better confidence while giving the interview.

# McKinsey Interview Puzzle - Aptitude #1 - Famous Egg Floor Riddle

Difficulty Popularity

* You are given 2 eggs.
* 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

# McKinsey Interview Puzzle - Aptitude #2 - Fake Coin Brain Teaser

Difficulty Popularity

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?

# McKinsey Interview Puzzle - Aptitude #3 - Awesome Probability Logic Riddle

Difficulty Popularity

You need to divide 50 marbles(25-red and 25-blue) into two boxes such that the probability of picking red marble is maximized.

Following conditions need to hold true :
1. None of box is empty
2. All the marbles must be in one of two boxes.

# McKinsey Interview Puzzle - Aptitude #4 - Weighing Bar Problem

Difficulty Popularity

The puzzle is if the shopkeeper can only place the weights in one side of the common balance.
For example: if shopkeeper has weights 1 and 3 then he can measure 1, 3 and 4 only.

Now the question is how many minimum weights and names the weights you will need to measure all weights from 1 to 1000.

# McKinsey Interview Puzzle - Aptitude #5 - Tough Probability Brain Teaser

Difficulty Popularity

Three people enter a room and have a green or blue hat placed on their head. They cannot see their own hat, but can see the other hats.
The color of each hat is purely random. They could all be green, or blue, or any combination of green and blue.
They need to guess their own hat color by writing it on a piece of paper, or they can write 'pass'.
They cannot communicate with each other in any way once the game starts. But they can have a strategy meeting before the game.
If at least one of them guesses correctly they win \$50,000 each, but if anyone guess incorrectly they all get nothing.
What is the best strategy?

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