American scientists proved that Monkey especially Chimps have better short-term memory than humans. They used very simple game like this one. When the numbers 1 through 9 appeared randomly on a screen and then disappeared, the chimpanzee was able to recall the exact sequence and location of each number. Now you can try this game too with your android phone or tablet.
You can chose from 3 levels:
Easy - You have to remember 4 - 7 numbers
Medium - You have to remember 5 - 8 numbers
Hard - You have to remember 6 - 9 numbers