Ooo chimpanzee that etc. Scientists in Germany have discovered that old world monkeys have much better numerical skills than were originally thought.
In a simple test of numeracy the long-tailed macaques were able to work out which plate of raisins contained the larger amount. Although strangely the test only worked when the monkeys were not allowed to eat the raisins.
Tests in which the monkeys have been allowed to eat the food are said to have impaired their judgement as they would often get the quantity wrong working solely on their natural impulses and their desire to eat whatever is in front of them.
It seems previous research has underestimated monkey’s maths abilities and their grasp of relative quantities. Fermat’s last theorem is surely the next problem to be solved by these abacus loving apes.