What is always in front of you but can’t be seen?

By using 'because' continuously three times, can you make an English statement ?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

I have eight fingers and two thumbs but I do not live. What Am I?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

What English word has three consecutive double letters?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

There are a hundred statements.

First person says: At least one of the statements is false.

Second person says: At least two of the statements is false.

Third person says: At least three of the statements are false.

Fourth person says: At least four of the statements are false.

..

..

..

Hundredth person says: At least a hundred of the statements are false.

Analysing it, how many statements do you think are false and how many are true?