I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

What Adam and Eve do not have but the rest of the people have?

Count the squares in the matchstick puzzle below?

Which Burger Is Different in below image?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

What can you see in the middle of March and April that you can never see in any other month?

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?