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

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

What word begins and ends with an E, but has only one letter?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

What breaks yet never falls, and what falls yet never breaks?

How many sides does a circle have?

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