If a wheel has 54 spokes, how many spaces are there between the spokes?

What do you call a fish without an eye?

I travel all around the world but always stay in the corner. What am I?

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?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

Why Aeroplane windows are round?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?