There are some mathematical concepts that seem straightforward, but once you dig deeper seem to make less and less sense. Transcendental numbers are one of 'em—but what the hell are they?

This video seeks to explain. Essentially, it's a quality which means numbers like Pi can't be constructed properly using normal algebra. But at this points it probably makes sense to hand over to Simon Pampena, Australia's Numeracy Ambassador, who can do a much better job of explaining things. [YouTube]