The power that you think about is trained by playing."PUZZLE ALGO" is card game that the arithmetic Olympics committee jointlydeveloped with the arithmetic workshop of The University of Tokyo.A basic rule is simple. The card with small number is put left. The cardwith large number is put right. However, if the number is the same, theblack is small. You reason the place of the card according to the Argocardinal rule.For kids concentration, memory, and analytical ability increase because itplays in this game. For the adult, it is expected it is useful for theprevention of the dementia syndrome because it plays in this game.*The arithmetic Olympics is a rally of arithmetic and mathematics with theworld authority. The chairman is Fields Medal winner's Heisuke Hironaka.Managing Director is worldwide mathematician Peter Frankl.