Sixten or Sixteen: How To spell?
The word Sixten is misspelled against Sixteen, a noun meaning "A symbol representing sixteen units, as 16, or xvi."
Sixteen has double "ee" is mispronounced as "e"Remember double 'EE' in between the strings Sixt & n which should not be misspelled with single 'E'
Wrong Spelling:  Sixt-e-n  Correct Spelling:  Sixt-ee-n 
Find more wrongly spelled words of Sixteen to spell it well.