Flash Memory
Glance at the digits β then click them in order, even when hidden.
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About this game
Inspired by the chimp Ayumu (Kyoto Primate Institute), this game shows digits 1-N briefly on a 5Γ4 grid. Once they hide, you must click them back in ascending order β pure spatial-numeric working memory.
Adults often max out at 7-8 digits at this flash speed. Ayumu the chimp consistently exceeded human performance at higher speeds.