- six times nine is fifty-four, while 6 * 9 = 54
- 1971 in roman numerals
- teaspoons in a tablespoon
- Avogadro’s number in moles
- answer to life the universe and everything
- speed of light in furlongs per fortnight
- drams in a pennyweight
- googol
- how many feet in a smoot
- one decade in seconds
- angstroms in a parsec
Collected from Mark Pilgrim, Aaron Swartz, Kottke, and waxy.org.