Answer:
What is black when it is clean and white when it is dirty?
What is Beethoven's favorite fruit?
A locked sphere without hinges or key. Break me open and golden treasures you'll see
Words come out of it, aligned in perfect silence. A messenger of black on white, a slinky fellow drawing lines, of thin and soft graphite
What is really easy to get into but really hard to get out of
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?