To get a song out of your head, try doing something like a puzzle or Sudoku.
13
No one knows Albert Einstein's last words. Just before he passed, he spoke several words in German, but his nurse only knew English.
154
All the gold ever mined could be molded into a cube 60 feet high and 60 feet wide.
38
No piece of square dry paper can be folded more than 7 times in half!
26
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
It is impossible to hum if your nose is plugged.
366
If you had 10 billion $1 notes and spent one every second of every day, it would require 317 years for you to go broke.
109