Published in 1956, this fantastic collection of mathematical mind-benders never gets old!
From simple riddles to complex story problems, The Moscow Puzzles has something for everyone. The sketches are wonderful, and some of the problems give you a cute glimpse into mid-20th Century Russian life.
The book is available via Kindle, in paperback, or free PDF.
The Moscow Puzzles: 359 Mathematical Recreations (Dover Recreational Math) via Amazon
