Answer:
I am an odd number. Take away a letter and I become even. What number am I?
The Titanic is still here.
The eight of us go forth not back to protect our king from a foe's attack. What are we?
Drop me and the world will shatter. You can always find me where you empty your bladder. What am I?
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?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.