Answer:
I cannot be felt, seen or touched. Yet I can be found in everybody. My existence is always in debate. Yet I have my own style of music.
Used on a diamond and left on a board. It's great for a gymnast his grip to restore. What is it?
Look into my face and I'm everybody. Scratch my back and I'm nobody.
What has two legs but doesn't walk?
A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note: 710 57735 34 5508 51 7718 Currently there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.