Which alphabet letter is a question?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

How many letters are in the alphabet?

In a chess board, the queen piece can move horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

how come the second man dies?