How can one talk without saying a single word?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

These types of puzzles are known as charades. What you have to do is find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be office.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

Solve the equation in the image by looking at the pattern closely.

How many letters are in the alphabet?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?