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

I am white when I am dirty, and black when I am clean. What am I?

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

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

Wednesday, Steve and Pam go to a restaurant to eat lunch. After eating lunch, they pay the bill. But Steve and Pam do not pay the bill. So…who does?

What does the below rebus riddle means?

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

One night, Louis and Adam were sitting together. Adam was watching a movie while his wife Louis was reading a mystery book. Suddenly the power went out and Adam decided to go to bed, but strangely Louis kept on reading. There was no artificial light around, so Louis kept on reading. How come?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?