Can you count the number of triangles in the given picture?

There is a basket full of hats. Three are white and two are black. Three men, Tom, Tim, and Jim, each take a hat out of the basket and put it on their heads without seeing the hat they selected or the hats the other men selected. The men arrange themselves so Tom can see Tim and Jim’s hats, Tim can see Jim’s hat, and Jim can’t see anyone’s hat. Tom is asked what color his hat is and he says he doesn’t know. Tim is asked the same question, and he also doesn’t know. Finally, Jim is asked the question, and he does know. What colour is his hat?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

What is the next number in the series?

15 29 56 108 208 ?

Prove that twice of ten is the same as twice of eleven.

How can you drop a raw egg from a height onto a concrete floor without cracking it?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

A father is locked up in jail. His wife has gone bankrupt. Their male child has to sell his hotel in order to gain some money. Yet their girl child does not care and is quite happy.

How can someone be so rude?

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