Brain-Teasers That Will Strike Your Fancy
Despite this book's age, it is a fun book. The chapters get progressively more challenging. I found the one involving probabilities especially challenging, even though I under the subject matter and permutations and combinations. I was stumped in a number of places. Then again, I'm no mathematician.
"Truth be told, one doesn't have to be a math wizard to enjoy this book. It's just great, great fun for anyone with a little math knowledge and a willingness to have her/his brain stretched a bit.