hard number puzzle with answer


2+9=711
14+6=820
17+11=628
12+3=???

This number puzzle can be really hard. Look at the picture and numbers and try to answer it correctly. Is the number pattern obvious at first sight?
created by zbynny
  

 



Brain teaser - Number And Math Puzzle - hard number puzzle with answer - 2+9=711 14+6=820 17+11=628 12+3=??? This number puzzle can be really hard. Look at the picture and numbers and try to answer it correctly. Is the number pattern obvious at first sight?




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Correct answer: 915

12 + 3 = ???
12 + 3 = (12-3)(12+3)
12 + 3 = 915



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