81 x 9 = 801. What must you do to make the this equation true?

How many triangles can you find in this given picture?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

Which alphabet letter is a question?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?