Why is the longest human nose just 11 inches?

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

which number am I?

What is wrong in the below Picture?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

What always comes into a house through the keyhole?

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

What does the below image rebus riddle means ?

John was drowned by he was not wet. How?

What does this Rebus Picture mean?