Who always enjoys poor health?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What is the relationship between these matchstick pictures below?

Why do you find that most of the buildings are deprived of the 13th floor?

Why did Navjot Singh Sidhu put the new January calendar in the freezer

I don't get anymore wetter, no matter how much rain falls on me.

If eleven plus two equals one, what does nine plus five equal?

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?

Which tank will fill first?

What has a ring but no finger?