00329nam a2200109 a 450000500170000000800410001704100080005810000230006624500750008926000390016465000160020320261014142056.0261009s2013    ii            000 0 eng d0 aeng1 aBoris A. Kordemsky10aThe Moscow Puzzles :b359 Mathematical RecreationscBoris A. Kordemsky  aNew YorkbDover Publicationsc2013  aMathematics