For decades, mathematicians have debated a simple question about graphs and the number of connections they have. Now, using arguments an undergraduate math student could have come up with, Asaf Ferber ...

Weird But True: Honeybees Can Learn the Difference Between Even and Odd Numbers They’re the first non-humans to exhibit this ability, indicating that you don’t need a brain cortex to do it.

We may memorise the rule that numbers ending in 1, 3, 5, 7, or 9 are odd while numbers ending in 0, 2, 4, 6, or 8 are even. Or we may divide a number by 2 – where any whole number outcome means ...

Each card had up to 10 even or odd numbers of shapes on them—the shapes being those of a circle, diamond, square or triangle—not unlike your average playing cards.