Monday, July 13, 2015

Keith Barry Math Trick




See if you can add this up without getting tricked!

The mentalist, Keith Barry had this simple addition trick on his show Brain Hacker (episode 1). See if you can get the correct answer. It may help to watch this in full screen.

1000+40=1040
1000+40+1000=2040
1000+40+1000+30=2070
1000+40+1000+30+1000=3070
1000+40+1000+30+1000+20=3090
1000+40+1000+30+1000+20+1000=4090
1000+40+1000+30+1000+20+1000+10=4100

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