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Comment by johnisgood

7 hours ago

Very easy to solve, just like it is easy to solve many other ones once you know the tricks.

I recommend this book: https://www.amazon.com/Secrets-Mental-Math-Mathemagicians-Ca...

3 comments

johnisgood

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jabbywocker 7 hours ago

Completely missing the point on purpose?

johnisgood 4 hours ago
Elaborate.
- jabbywocker 38 minutes ago
  
  you don’t solve it by brute forcing possible solutions until one sticks