I was playing with some of the test questions in the INTRO, and I stumbled more than once over something that goes slightly against my logic (which is probably twisted ;)), in regards to requirements mapped as an equation. Here is what I am talking about: there are questions phrased like "Plan the IP addressing and subnets in the network below, where a class B network x.y.0.0 is to be used, with the MAXIMUM number of hosts per subnet at 100" (my emphasis of MAXIMUM).

The way I interpret MAXIMUM is "no more than", which leads me to an equation like:

(2)^n - 2