Answer:
I have 24 keys but cannot open any locks. Sometimes loud, sometimes soft. What am I?
Adored by few, feared and hated by many. Mistress of the entire universal reason, master in the art of numbers. Some may have solved many of my mysteries, but there are still many of them to find. What am I?
If you drop me, I'm sure to crack. Give me a smile and I'll always smile back. What am I?
Two in a whole and four in a pair. Six in a trio you see. Eight's a quartet but what you must get is the name that fits just one of me.
I start in little but I end in full you'll find me in half and complete.
What did the piece of wood say when he saw the screwdriver and screws approaching?