Answer:
I am an odd number. Take away a letter and I become even. What number am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.
Everyone asks for me but yet everyone hates to face me. For someone I am agony, for others I am relief! What am I?
I am a mountain at night, meadow at day. What am I?
I am always hungry I must always be fed. The finger I lick will soon turn red.
Give it food and it will live, give it water and it will die.