MathsPoints.ie - So this a problem by Japanese puzzle maker Nob Yoshigahara that he called his masterpiece. The beauty of it is that he has come up with a puzzle that almost
![The number tree puzzle, Number Tree puzzle solution, Nob's Number Puzzle, #TheNumberTree, #NobPuzzle - YouTube The number tree puzzle, Number Tree puzzle solution, Nob's Number Puzzle, #TheNumberTree, #NobPuzzle - YouTube](https://i.ytimg.com/vi/VePF784JZZ8/maxresdefault.jpg)
The number tree puzzle, Number Tree puzzle solution, Nob's Number Puzzle, #TheNumberTree, #NobPuzzle - YouTube
![Amazon.com: The Puzzles of Nobuyuki Yoshigahara (Problem Books in Mathematics): 9783030628956: Liu, Andy, Sicherman, George, Yoshigahara, Takayuki: Books Amazon.com: The Puzzles of Nobuyuki Yoshigahara (Problem Books in Mathematics): 9783030628956: Liu, Andy, Sicherman, George, Yoshigahara, Takayuki: Books](https://m.media-amazon.com/images/I/61kEe9TkmNL._AC_UF1000,1000_QL80_.jpg)