How many sides does a circle have?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

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

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

During which month do people sleep the least?

What month of the year has 28 days?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.