Could you pass the Acid Test at Google or Microsoft?

Over the years, I've known dozens of people who've interviewed at Microsoft, and who have been asked all sorts of insane questions in their interviews. In interviews, I have often found the simplest questions were the best, like "What is the last book you read, and when was that?" When is almost always instructive. The answer ranges from "on the bus coming here," to "7th grade."

The Pingdom website came up with this compilation of questions:

Questions by Google

How many golf balls can fit in a school bus?

You are shrunk to the height of a nickel and your mass is proportionally reduced so as to maintain your original density. You are then thrown into an empty glass blender. The blades will start moving in 60 seconds. What do you do?

How many piano tuners are there in the entire world?

In a country in which people only want boys, every family continues to have children until they have a boy. If they have a girl, they have another child. If they have a boy, they stop. What is the proportion of boys to girls in the country?

Describe a chicken using a programming language.

Questions by Microsoft

You have a bucket of jelly beans. Some are red, some are blue, and some green. With your eyes closed, pick out 2 of a like color. How many do you have to grab to be sure you have 2 of the same?

Pairs of primes separated by a single number are called prime pairs. Examples are 17 and 19.

Prove that the number between a prime pair is always divisible by 6 (assuming both numbers in the pair are greater than 6). Now prove that there are no ‘prime triples.’

Imagine an analog clock set to 12 o’clock. Note that the hour and minute hands overlap. How many times each day do both the hour and minute hands overlap? How would you determine the exact times of the day that this occurs?

How much does a 747 weigh?

Imagine a disk spinning like a record player turn table. Half of the disk is black and the other is white. Assume you have an unlimited number of color sensors. How many sensors would you have to place around the disk to determine the direction the disk is spinning? Where would they be placed?
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