11 books • 1 series
Adventures In Recreational Mathematics - Volume Ii (Problem Solving in Mathematics and Beyond, #21)
Adventures In Recreational Mathematics - Volume I (Problem Solving in Mathematics and Beyond, #21)
Adventures In Recreational Mathematics (In 2 Volumes) (Problem Solving in Mathematics and Beyond, #21)
Problems For Metagrobologists: A Collection Of Puzzles With Real Mathematical, Logical Or Scientific Content (Problem Solving in Mathematics and Beyond, #3)