Sagir Ahmad Math book Is use full to Bank ssc Railway etc exam . SSC Combined Metric Level Exam — Combined Metric Level Pre-Exam, Multitasking (Non-Technical) Staff, CISF Constable (GD), Constable (GD) & Riflemen (GD) and Other Competitive Exams. Banking Conduct Exam – IBPS , Bank PO ,Clerk ,Exams etc Railway Conduct Exam – NTPC , Group-D , Junior Engineer , RRB , RPF , Ticket Clerk , T.T , etc. All Other Exam – Navy , Air – force , etc. ALL State Exam - CTET , TET , B.ED , Bihar Police ,