What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

I make two people out of one. What am I?

How many times can you subtract the number two from the number fifty?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

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