Face mask math puzzle with answer


What is the best and full answer to the following math puzzle? See answer & hint below.
created by zbynny
  

 



Brain teaser - Number And Math Puzzle - Face mask math puzzle with answer - What is the best and full answer to the following math puzzle? See answer & hint below.




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How many people solved this? 350 solved this


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There can be more correct answers..

face mask = +4 (result 1)

face mask = -4 (result 2)



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