[quote=@Mammalia] I'm now finished with my Advanced Algebra (other than the Hardest Problem in Advanced Algebra)! =D The author of the book, who has a PhD, said it took him 7 hours to solve his hardest problem, so I'm going to attack it tomorrow. Then if one or more of you wants to have a go at it (and knows about the fundamental principle of counting, permutations, combinations, and the binomial formula) then I'll put it here. [/quote] Fun fun.