Riddles and Brain Teasers

Logic Puzzles

One of the best riddles and brain teasers goes as follows:
There are three switches downstairs. Each corresponds to one of the three light bulbs in the attic. You can turn the switches on and off and leave them in any position. How would you identify which switch corresponds to which light bulb, if you are only allowed one trip upstairs?

Cool Math Games

- Solution and More Games

One brick is one kilogram and half a brick heavy. What is the weight of one brick?

Logic Riddles

- Answer and More Riddles

Brothers and sisters, I have none but this man's father is my father's son. Who am I looking at?

Logic Problems

- Solution and More Problems

You are shown two doors - one leading to hell and the second one to heaven and only the door guards know what is behind the doors. One guard is always lying and the other is always telling the truth (of course, you don't know who is lying). You can ask only one guard one question. What question can get you to heaven?

Water and Weighing Puzzles

- Solution and More Puzzles

If you had a 5-liter bowl and a 3-liter bowl, and an unlimited access to water, how would you measure exactly 4 liters?

Einstein's Riddles and Brain Teasers

- Solution and More Riddles

A fellow encountered a bear in a wasteland. Both got frightened - fellow ran to the north, bear to the west. Suddenly the fellow stopped, aimed his gun to the south and shot the bear. What color was the bear?

Number Puzzles

- Answer and More Puzzles

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

River Crossing Puzzles