00485nam a2200145   4500020001800000020001500018082001800033100002100051245008800072260004900160300006000209500002000269650003400289700001600323  a9780486409177  a0486409171  a510 A952 19801 aAverbach, Bonnie1 aProblem solving through recreational mathematics /cBonnie Averbach and Orin Chein.  aMineola :bDover Publications, Inc.,cc1980.  axvi, 458 p. :bsome col. ill. ; tabs and figs. ; 24 cm.  aIncludes index.14aMathematicsxProblem solving.1 aChein, Orin