Find the hidden tiger in the given optical illusion ?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

What's the only room from which no one can enter or leave

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Suppose that you are trapped on the surface of a frozen lake. The surface is so smooth and ideal that there is no friction at all. You cant make any grip on the ice and no wind is blowing to help you out. You have just a mobile phone with you which has got no reception disabling you to call for help.

How will you plan your escape before you freeze to death on the frozen lake?

Count the number of triangles in the picture below:

There are forty elephants and they have forty-fore heads. How can this be possible?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

Can you place six X (crosses) in below board without making three in a row in any way ?