Please help me understand how to duplicate the solution to this puzzle: What is the largest amount of postage you cannot make exactly with 7- and 11-cent stamps? (Spoiler inside, so don't look if you want to figure it out yourself - I have the solution but would like to learn how it was solved.) [more inside]
posted by widdershins on Sep 17, 2009 - 5 answers

I'm interested in websites that explain/list/provide examples of word oddities... [more inside]
posted by widdershins on Oct 31, 2007 - 14 answers