Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

When 99 is considered higher than 100?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

Can you make a six-letter word using the letters N, A and B ?

How many letters are in the alphabet?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

You need to move three matchsticks to form three squares. Can you do it?