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

ST ND RD TH '?'

What's the only room from which no one can enter or leave

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

What can you hold in your right hand, but never in your left hand?

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.

Chef Andrea has to light the kitchen stoves to open her restaurant for the day. There are three stoves in the kitchen: A glass stove, a brick stove, and a wood stove. She only has one match. Which does she light up first?

How can one talk without saying a single word?

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

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?