Its a useless idea, if I remember correctly there were 5 or 6 cube nets on the test, with several questions based on each. The rubber plan might work for the first question, but you will then have no rubber to erase the cube you drew for the first question, to make a new cube. Maybe?
Anyway, surely if you don't have the spatial awareness to pass that test and use "initiative" instead, they will soon figure out you don't have what it takes either at college or at a unit? Could be a pretty risky manoeuvre, I mean the tests must be there for some reason.
Maybe not, who knows?