00517nam a2200157   450000500170000000800410001704000080005808200210006610000210008724501090010826000350021730000270025250000370027965000220031670000210033820230130115725.0230130b        |||||||| |||| 00| 0 eng d  beng  a510.22 B468 20061 aBenjamin, Arthur1 aThink like a maths genius :bthe art of calculating in your head /cArthur Benjamin and Michael Shermer.  aNew Delhi :bRupa Co.,cc2006.  axxiv, 277 p. ;c20 cm.  aIncludes bibliography and index.14aHead calculating.1 aShermer, Michael