I remember watching Clark's It Takes Two after school back in the day, and while I enjoyed the front game, I agree that the bonus round was completely baffling. I eventually sort of figured out the "within a percentage of the right answer" idea they were going for, but the lack of explanation the show gave made it far more confusing than it should have been. All they ever said was "If the answer is between X and Y you win" with no clue whatsoever as to how they came up with those numbers, and the fact that sometimes the X in that statement would be zero only made it feel more like they were just pulling numbers out of their asses until it happened enough times for me to eventually figure out it meant the contestants severely lowballed the answer.
(Semi-related: I recall years ago, on the long defunct MSN board that was the forerunner to Golden-Road.net, during a rather long losing streak for the Check-Out game, I suggested they could normalize the difficulty by making the difference you had to be within 10% instead of a flat amount like $2. I ended up coming to the conclusion that, even properly explained, that would be too confusing for "Joe Plinko" to understand.)
