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The power that you think about is trained by playing.

"PUZZLE ALGO" is card game that the arithmetic Olympics committee jointly
developed with the arithmetic workshop of The University of Tokyo.
A basic rule is simple. The card with small number is put left. The card
with large number is put right. However, if the number is the same, the
black is small. You reason the place of the card according to the Argo
cardinal rule.
For kids concentration, memory, and analytical ability increase because it
plays in this game. For the adult, it is expected it is useful for the
prevention of the dementia syndrome because it plays in this game.
*The arithmetic Olympics is a rally of arithmetic and mathematics with the
world authority. The chairman is Fields Medal winner's Heisuke Hironaka.
Managing Director is worldwide mathematician Peter Frankl.