This does not seem like a viable scheme in typical multiple choice tests. In a typical test question, there are often (almost always?) obvious non-answers, so i

This does not seem like a viable scheme in typical multiple choice tests. In a typical test question, there are often (almost always?) obvious non-answers, so it is significantly easier to guess what is wrong than to guess what is right. When you make a multiple choice test question with, say, 4 choices, it is actually hard to make all 4 choices look reasonable. I guess the deterrent to taking advantage of such a strategy is the risk involved. You are wiped out if you miss just one. So you have to be supremely confident or a real gambler to knowingly adopt such a strategy.