The quiz asks for a range that will include the correct answer 9/10 times. Not a point estimate. If you don't have the relevant trivia in your head, broaden th

The quiz asks for a range that will include the correct answer 9/10 times. Not a point estimate. If you don't have the relevant trivia in your head, broaden the range proportionally. I think the intended point is that we're bad at judging probabilities. Getting 100% right (within range) is probably supposed to be as concerning as getting 0% right.