00310nam a2200121Ia 450000500170000000800410001704100080005808200150006610000200008124500360010126000420013730000090017920260720174623.0260720s2004    xx            000 0 und d  aeng  a510.2 CHAM  aChampanerkar, M  aMore maths puzzles for pleasure  aBangalorebSadhana Publicationsc2004  a102p