What month of the year has 28 days?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

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

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

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Which is the correct shadow of the bird?

What is more useful when it is broken?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?