If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

Which is the correct shadow of the bird?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

What part of the chicken has the most feathers?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

You can see three almost identical images below. Can you spot the odd one out from them?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

The more it dries, the wetter it becomes. Can you tell what it is?