Math

The 71 Puzzle – One Dot Changes Everything!

Make the equation correct by adding one blue dot, or erasing one blue dot. A single dot changes everything!

Keep It 💯 Puzzle: 4 dots to make this true!

Sources

One of these pixels on the scoreboard should be either turned off or turned on. from mathpuzzles


https://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board=riddles_medium;action=display;num=1091299465
https://www.utest.com/forums/11636/page/1

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“Multiply Numbers By Drawing Lines” This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 5/5 stars on 4 reviews)
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