Quote from NoDoji:
It seemed to me to be a test of risk intelligence as related to an understanding of probabilities. If you don't know, you choose 50 because a guess is a pure gamble, so you're better off sitting on the sideline until you get something you know.
In trading, if you know there's positive expectancy for a trade setup in a given price environment, you put on the trade without hesitation. If you don't know the odds of success, you don't trade until you do the research that results in a positive expectancy plan.
ADD: I scored just under 95 despite only answering a few questions with certainty.