Complete the table series riddle by finding the number that can replace "??".

What does this below rebus puzzle mean?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Can you find the hidden animal in the picture below?

Can you guess the name of the month by looking the below rebus ?

Why do people go to bed?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

What can go up a chimney down, but can’t go down a chimney up?