I am the number, wise old twenty. I always wear, my long thin hat, And stand on one leg, I've never sat. I'm last of last, and last of first I'm last of the best, and last of the worst. Who am I?
I am the start of war and end of sorrow. You can't express wisdom without me but I am at the heart of dimwits. You may find me in waves but never in oceans. What am I?