A hunter walks a mile due south, turns and walks a mile due east, turns again and walks a mile due north, only to find himself back where he started. The hunter draws a bead on a bear and shoots it dead. What color is the bear?

I can make you laugh and make you cry. I can’t be disputed but many will try. You may avoid me to the greatest extent But my reality is permanent.

The person who built it doesn’t want it. The person who bought it doesn’t need it. The person who needs it doesn’t know it. What am I?

If you throw me out the window, you’ll leave a grieving wife, but drop me in the middle of a door, and you might just save a life. What am I?

I’m born when giants meet their end, yet even light can’t escape my bend. I warp both time and stretch out space, with singularity at my base. No surface have I, no solid face, but cross my edge and there’s no retrace.