How can one talk without saying a single word?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

Can you find the missing piece of the Porsche?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Before Balboa discovered the Pacific Ocean, which was the largest ocean before that?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

I make two people out of one. What am I?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.