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

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

James bond was pushed out of an aeroplane without any parachute.
He survived, How come?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

What is so fragile that saying its name breaks it?

Can you identify if it's a murder or a suicide ?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho