I think I'll explain how the show works since most people might think what Jon'C said was correct even though it’s not.
This show is very similar to how "Who wants to be a millionaire?" plays except the adults (not the 5th graders) are given questions from grades 1-5, two from each grade level.
Instead of lifelines, they are given "cheats" where they can either "peek" at the 5th grader's answer (they can see it but they don't have to take the answer as their own), they can "copy" their answer (they're forced to use the kid's answer), or they can allow the kid to "save" them by allowing them to use the kid's answer if their answer is wrong.
If the adult at anytime decides to give up and take their money, they can do so by "dropping out of school" but they have to say to the camera that they "are not smarter than a 5th grader" before they can go.
IMO, after watching last night's episode, I think the show is rigged. Why? Because the adults can't possibly be THAT stupid as the two were last night. The supposed "UCLA grad with degree in law" couldn't answer a single question on his own. Not only that, I'm pretty sure the kids aren't your average 5th grader. They mostly are honor-roll straight-A students who were given either all the answers or allowed to study for the answers before the show began to roll. That's at least my hunch after watching last night but who knows... maybe the average adult is stupid like that? I have to admit I missed one or two questions last night
The cake is a lie... THE CAKE IS A LIE!!!!!