User blog comment:MysteryBoy/Almost-Impossible Challenges/@comment-26531060-20120722032339

All are impossible, except for 2, which requires lots of time and money, 4 only if that lane only has the Gargantuar, plant lots of Puff-shrooms and Imitater Puff-shrooms to hinder it's progress, but still very hard, nearly impossible, 7 is too easy, but not gonna do it.