00388nam a22001217a 4500020001800000082002600018245008000044260005400124300002800178650002400206700001700230700001900247  a81-7992-350-9  aRef. 793.74 T531 200710a300 more brain-twisting puzzles /cCompiled by Ken Russell & Philip Carter.  aLondon, U.K. :bArcturus Publishing Ltd.,cc2007.  a106 p. :bill. : 30 cm.14aMathematical games.1 aRussell, Ken1 aCarter, Philip