I am a prime number.
The double of myself is equal to the square of me.

which number am I?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

A wealthy man lives alone in a small cottage. Being partially handicapped he had everything delivered to his cottage. The mailman was delivering a letter one Thursday when he noticed that the front door was ajar. Through the opening he could see the man's body lying in a pool of dried blood. When a police officer arrived he surveyed the scene. On the porch were two bottles of warm milk, Monday's newspaper, a catalog, flyers, and unopened mail. The police officer suspects it was foul play. Who does he suspect and why?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

Can you solve this picture maths equation?

What has lots of eyes, but can’t see?

I have no life, but I can die. What am I?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

Identify the 10 differences between the two given pictures.