What month of the year has 28 days?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Always in you, Sometimes on you;

If I surround you, I can kill you.

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?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

If you say my name, I will no longer exist. What am I?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

John was piloting a plane behind a car but was never able to overtake it. Why?