Did you know that eleven plus two minus one equals twelve?  The proof 
is quite simple.... Start with eleven: E-L-E-V-E-N   Now, add two: E-L-E-V-E-N T-W-O   Take away one: -L-E-V-E- T-W-   And rearrange the letters: T-W-E-L-V-E    And there you have it, so next time its asked on a test, you'll know what the  real  answer is