Seriously, Nav is the exam for which that approach is the least applicable. The routes you are given aren't in the Confuser,
Evo,
I don't suggest learning the answers by rote, just that if you can answer the nav questions in the confuser you will see exactly analogous questions in the exam which you will also be able to answer. Many will also be exactly the same.
There are many ways to pass an exam. The most time-consuming and hit and miss is to learn the subject thoroughly without reference to exam questions. The simplest and easiest is to learn to answer the questions they ask, whether that is the type of question or even the actual question.
More upstanding souls than me will probably use a combination of the two methods above. I more or less used the second, but I still think it gave me a reasonable understanding of the subjects involved.
QDM