Mohammad el Mir is good at mental calculation, really good! In fact, he’s so quick he came first at The Junior Mental Calculation World Championship 2014 when he was only 11 years old. He was invited more recently to a German talent show and was able to add correctly 200 numbers in less than 90 seconds, while it took four math professors over 2 minutes to compute 50 numbers each and they got the wrong total.

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