http://www.newsweek.com/honeybees-basic-math-study-1320682

Honeybees can do basic math, according to a study published in the journal Science. An international team, led by researchers from RMIT University in Australia, was able to teach bees to associate certain colors with the process of addition and subtraction.

The findings are the latest demonstration of the mathematical ability of bees. In fact, the same team of researchers previously found that honeybees are able to comprehend the mathematical concept of zero, placing them in an elite group of animals known to be capable of the feat, including humans, dolphins, primates and some birds.