GeeksforGeeks

A boy travels in a scooter. After covering 2/3rd of the distance, the wheel got punctured. He covered the remaining distance by walking. Walking time is twice of the time taken in scooter. How many times the riding speed is of the walking speed?

There are 9 coins. 8 of them are of 1 gm and 1 is of 2 grams. Find out the heavier coin in minimum number of weighing and how many weighing you need?

Draw three concentric circles with a line passing through their centers without lifting your hand.

A pipe can fill a tank in 3 hours due to leakage it takes 3.5 hours to fill the same tank then how many hours will the leakage can empty the tank.

A car is traveling at a uniform speed. The driver sees a milestone showing a 2-digit number. After traveling for an hour the driver sees another milestone with the same digits in reverse order. After another hour the driver sees another milestone containing the same two digits with a zero in between(0). What is the average speed of the driver?

A man pushed his car to a hotel and lost his fortune. What happened?

A football team played 60 matches out of which 30% were won by them. If they start winning all the next matches after how many matches will the average winning rate be 50%

You have eight balls all of the same size…

…7 of them weigh the same, and one of them weighs slightly more. How can you find the ball that is heavier by using a balance and only two weighings?

Design an evacuation plan for San Francisco

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?

Read more: http://www.businessinsider.com/15-google-interview-questions-that-will-make-you-feel-stupid-2009-11#you-are-shrunk-to-the-height-of-a-nickel-15#ixzz0lZLP5SzO

Why are manhole covers round?

A carpenter is trying to build some furniture, he need a list wood blocks with different length, say L1, L2, ... Ln where 1 <= Li <= LMAX for i = 1,2. .. n. He need to purchase whole wood blocks from the shop. The wood blocks in the shop are fixed length, say LEN, LEN >= LMAX.

Can you help the carpenter save money by figuring out the minimum number of whole wood blocks he need to purchase?

How do we measure forty-five minutes using two identical wires, each of which takes an hour to burn. We have matchsticks with us. The wires burn non-uniformly. So, for example, the two halves of a wire might burn in 10 minute and 50 minutes respectively

A team of software professionals are planning for a trip and they want to fix the budget according to the average salary of the team. No one wants to disclose his/her salary. How do they find out the average salary?

A deck of 52 cards having exactly 10 cards facing up is given to a blind man. How can he divide the cards into two piles(not necessarily of equal size), with each pile having the same number of cards facing up?