How many triangles are there on the puzzle below?

Find the hidden tiger in the given optical illusion ?

What do you see in the given picture?

Can you place three balls such that the equation shown in the picture holds true?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

In the image given, you can find several triangles. Can you count them all?

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?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?