TY - JOUR AB - Article PDF first page preview Close This content is only available as a PDF. © The Institute of Mathematics and its Applications TI - Puzzles, Challenges and Investigations JO - Teaching Mathematics and Its Applications: International Journal of the IMA DO - 10.1093/teamat/18.2.94 DA - 1999-06-01 UR - https://www.deepdyve.com/lp/oxford-university-press/puzzles-challenges-and-investigations-7Pol0cQo4x SP - 94 EP - 94 VL - 18 IS - 2 DP - DeepDyve ER -