I shave every day, but my beard stays the same. What am I?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

What kind of band never plays music?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

When we see 2 but call 10?

Find the missing number in the sequence below:

Which is the rope you never skip with?

81 x 9 = 801. What must you do to make the this equation true?

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?