00331nam a2200109Ia 450000500170000000800410001708200150005810000180007324500850009126000350017630000100021120260205054504.0260111s9999||||xx |||||||||||||| ||und|| a513 B470S aBhatia , A.S. 0aSpeed maths and beauty of numbers: with problems on mental ability and reasoning aNew DelhibDeep and Deepc2006 a170p.