I’m sorry. I really like puns but am terrible at forming my own. The one in the title is particularly precarious given that most people never learned, or at least haven’t retained, what a surd is.
For those of you who, like me, don’t get past KS4 foundation in your level of daily mathematical ‘stretch’…this is for you. Everyone else: this is for your pupils:)
PS- to my shame, I was flummoxed at first. You can google ‘infinite surds’ if you need a kick-start.
PPS – the ‘simple’ answer still involves a surd, and there are two possible answers (it’s formed from a quadratic). However, they are at least finite, which is probably a smudge more manageable than the original.
Until I Know Better 