I am a teacher with qualification M. Sc. (Maths), M. Ed. (I) I’m teaching in various boards (like CBSE, ICSE, BSSEB, etc.) up to +2 level in Mathematics and Science & Maths up to X or ICSE from 1973. I have also guided students of another State Boards. Presently writing for “mpkeshari.com”, “icseguess.com” , “cbseguess.com” , “iitguess.com” etc. e-book on Mathematics is available in “icseguess.com” and “cbseguess.com”.