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Abstract

1. Eleven + two = twelve + one is an amazing and rightly famous anagram. I wish to add to its mystique by revealing some more deep coincidences, based on rearranging the terms to

2. two + eleven = one + twelve, or, as I prefer.

3. one + twelve = two + eleven (a word reversal of equation #1).

These two are also anagrams and palindromes in numerical form (shown for #3): 1+12=2+11. (The palindrome requires altered punctuation, as is conventional in verbal palindromes.) More surprisingly, they're both anagrams and palindromes in Roman numerals as well: I+XII=II+XI.

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