What Am I Riddles

Question: Looking at my face, I'm no more than six.
Look at the rest of me and I'm 21.
You'll see my twin and me in Las Vegas.
Say my name and you'd be uttering a threat.

What am I?

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

Question: What is red and white at home, but can never be that when it leaves?

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

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