** [[spoiler: The Biosphere experiment at the end of ''5th Grade''.]] It seems like AlphabetSoupCans, but then consider this: [[spoiler: The aliens are gathering specimens to take back to their planet...and the biosphere experiments are to figure out ''how many'' brains they'll need, so they can breed all of them on ''their'' planet.]]
*** Furthermore, not only did the aliens [[KarmaHoudini get away scot-free]], the heroes may have inadvertently ''helped'' them by doing said experiments.
* FridgeLogic: Seems odd that the villagers in ''Math'' would give away clues that would incriminate ''themselves''.
** FridgeBrilliance: Until one realises that they were blackmailed into doing so, so of course they would try not to let the blackmailer know about it, they want the blackmailer to think the Cluefinders are finding the treasures themselves.