Press my buttons and i will give you the answers you require. I'm hard and fit in the palm of your hand.

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?

Poor people have me, rich people want me and if you eat me you will die.

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.