Riddles (Page 21)

A glass green fortress sits on a hill. Certain things can enter, and certain things can't. For example, Beer can go in, but wine cannot. Eyeballs can go in, but eyes cannot. The castle has a floor and walls, but no ceiling. There is a roof, however. What is the rule about things that can go in and out?

Four feet
Jagged teeth
Fleet of movement
water and land
I have no mood
To me you're food
as I drag you under

I have one, you have one. If you remove the first letter, a bit remains. If you remove the second, bit still remains. After much trying, you might be able to remove the third one also, but it remains. What am I?

You may see it but can't find it, you may feel it but cant touch it, it helps nature but sometime kills

If you have me, you want to tell me.
If you tell me, you don't have me.

I can go up a chimney down,
but can't go down a chimney up.

I am the center of Gravity.

Forward I am heavy,
But backwards I am not.

In buckles or lace, I help set the pace; the farther you go, the thinner I grow