Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Can it be possible to build a house that has all its four walls facing towards the South?

A man desired to get into his work building, however he had forgotten his code.
However, he did recollect five pieces of information
* Fifth number + Third number = 14
* The fourth number is one more than the second number.
* The first number is one less than twice the second number.
* The second number and the third number equals 10.
* The sum of all five numbers is 30.

What is the code ?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

When it is alive we sing, when it is dead we clap our hands. What is it?

What does this rebus puzzle means ?

What work can one never finish?

Solve this riddle by finding the odd one out from the rest.