What Am I Riddles

Question: When is... 5>0, 0>2 and 2>5? Hint: Hands

Question: Give me food, and I will live. Give me water, and I will die. What am I?

Question: The more you work, the more I'll eat.You keep me full, I'll keep you neat. What am I?

Question: Enter one hole and leave three,
once you succeed I'm on thee?

What am I?

Question: What's cheaper than gold, yet more valuable.Hard to find, but easy to loose