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

Find the value of "?" in the ball picture Riddle below:

The dirtier I get, the whiter I look. Who am I?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

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?

Why do Chinese men eat more rice than Japanese men do ?

Look at the picture and find out which square is not linked with any of the other squares.

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

The centre of the third figure is empty. What digit should fit inside?