Which is the correct shadow of the bird?

I am the fastest animal but cannot climb the tree. What am I?

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 eleven plus two equals one, what does nine plus five equal?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?