It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

What is the fastest way to double your money?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

What has 88 keys?

What is black when you buy it, red when you use it, and gray when you throw it away?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

When it is alive we sing, when it is dead we clap our hands. What is it?

A man is found hanging dead from the ceiling of a room. The room’s dimensions are 15 x 15 x 15. The man is only 6ft tall and the rope was only 2ft long. There are no windows and only one door to the room. The door is bolted shut from the inside, and a puddle of water is under the man. How did he kill himself?