A family of gorillas has learned how to order food on a tablet.
The primates are given a sequence of numbers from one to nine.
They have to remember the number order and input it into a touchscreen device to earn a treat.
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Footage shows one gorilla remembering the correct string of numbers and earning itself a snack.
However, the other two step up to the touchscreen and draw a blank.
The gorilla family has been working with the number ordering system at Kyoto City Zoo in Japan for around five years.
Daddy gorilla Momotaro, 24, struggles the most with remembering the numbers.
He can only solve puzzles with numbers from one to six, and his error rate is high.
His sons Gentaro, 13, and Kintaro, 6, are better suited to the tablet and can solve number sequences with a 70% success rate.
They can also answer puzzles with numbers of 10 or more and are much faster than their dad, as reported by What’s The Jam.
Their mother Genki, who is 14 years older than her partner, also manages well with the tablet but does not appear in the clips.
Many modern zoos are implementing similar systems to replace traditional animal husbandry methods.
It is said to reduce distrust and nervousness between the animals and their keepers when dealing with everyday tasks such as feeding and taking medication.
One local said: “These King Kongs are getting too smart!”
Another added: “I hope Momotaro can get better at it.”
“It looks the same as ordering conveyor belt sushi on a tablet,” joked someone else.
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