http://www.pennypress.com/samplepuzzles/srwoo19.pdf
I used to do whole books of these puzzles all the time back in the day… anyone know where I can find more online?
Exploring the Infinite
http://www.pennypress.com/samplepuzzles/srwoo19.pdf
I used to do whole books of these puzzles all the time back in the day… anyone know where I can find more online?