Answer:
Some will use me, others not. Some have remembered, others forgot. For profit or gain, I'm used expertly. I can't be picked off the ground or tossed into the sea. What am I?
There is one in a minute two in a moment and none in a thousand years. What is it?
What has keys but no locks a space but no room and you can enter but can't go in?
I have three feet but no arms or legs
I am a mountain at night meadow at day
Why was the cook arrested?