Q1: Classic: If a bear walks one mile south, turns left and walks one mile to the east and then turns left again and walks one mile north and arrives at its original position, what is the color of the bear.
tags: microsoft puzzle

Q2: Given a rectangular (cuboidal for the puritans) cake with a rectangular piece removed (any size or orientation), how would you cut the remainder of the cake into two equal halves with one straight cut of a knife?
tags: microsoft puzzle

Q3: There are 3 boxes. One of them has red balls, one has blue balls only and the other has mixture of red and blue balls. The labels on their boxes always lie. (i.e. if the label says red, you are sure that it doesn't have red balls only,it could be a mixture) The task is to pick one box and pick only one ball from it and then correctly label all the three boxes.
tags: microsoft puzzle

Q4: You have 8 balls. One of them is defective and weighs less than others. You have a balance to measure balls against each other. In 2 weighings how do you find the defective one?
tags: microsoft puzzle

Q5: Why is a manhole cover round?
tags: microsoft puzzle

Q6: How many cars are there in the USA? (or how many gas stations or how many houses)
tags: microsoft puzzle

Q7: You've got someone working for you for seven days and a gold bar to pay them. The gold bar is segmented into seven connected pieces. You must give them a piece of gold at the end of every day. If you are only allowed to make two breaks in the gold bar, how do you pay your worker?
tags: microsoft puzzle

Q8: One train leaves Los Angeles at 15mph heading for New York. Another train leaves from New York at 20mph heading for Los Angeles on the same track. If a bird, flying at 25mph, leaves from Los Angeles at the same time as the train and flies back and forth between the two trains until they collide, how far will the bird have traveled?
tags: microsoft math puzzle

Q9: You have two jars, 50 red marbles and 50 blue marbles. A jar will be picked at random, and then a marble will be picked from the jar. Placing all of the marbles in the jars, how can you maximize the chances of a red marble being picked? What are the exact odds of getting a red marble using your scheme?
tags: microsoft math puzzle

Q10: Imagine you are standing in front of a mirror, facing it. Raise your left hand. Raise your right hand. Look at your reflection. When you raise your left hand your reflection raises what appears to be his right hand. But when you tilt your head up, your reflection does too, and does not appear to tilt his/her head down. Why is it that the mirror appears to reverse left and right, but not up and down?
tags: microsoft puzzle

Q11: You have 5 jars of pills. Each pill weighs 10 gram, except for contaminated pills contained in one jar, where each pill weighs 9 gm. Given a scale, how could you tell which jar had the contaminated pills in just one measurement?
tags: microsoft puzzle

Q12: If you had an infinite supply of water and a 5 quart and 3 quart pail, how would you measure exactly 4 quarts?
tags: microsoft puzzle

Q13: Implement a multiple-reader-single-writer lock given a compare-and-swap instruction. Readers cannot overtake waiting writers.
tags: microsoft sw programming

Q14: Given a makefile, design the data structure that a parser would create and then write code that iterates over that data structure executing commands as needed.
tags: microsoft sw programming

Q15: 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?
tags: microsoft math puzzle

Q16: Which way should the key turn in a car door to unlock it?
tags: microsoft puzzle

Q17: If you could remove any of the 50 states, which state would it be and why?
tags: microsoft puzzle

Q18: There are four dogs/ants/people at four corners of a square of unit distance. At the same instant all of them start running with unit speed towards the person on their clockwise direction and will always run towards that target. How long does it take for them to meet and where?
tags: microsoft math puzzle

Q19: (from Tara Hovel) A helicopter drops two trains, each on a parachute, onto a straight infinite railway line. There is an undefined distance between the two trains. Each faces the same direction, and upon landing, the parachute attached to each train falls to the ground next to the train and detaches. Each train has a microchip that controls its motion. The chips are identical. There is no way for the trains to know where they are. You need to write the code in the chip to make the trains bump into each other. Each line of code takes a single clock cycle to execute. You can use the following commands (and only these); MF - moves the train forward MB - moves the train backward IF (P) - conditional that is satisfied if the train is next to a parachute. There is no "then" to this IF statement. GOTO
tags: microsoft sw programming puzzle

Q20: Tell me the courses you liked and why did you like them.
tags: microsoft sw general