The book you're likely referring to is "Quantitative Aptitude for Competitive Examinations" by Dr. S.D. Yadav. This comprehensive guide is a popular resource for students preparing for various competitive exams, including the Civil Services, Banking, SSC, Railways, and other government job exams.
Class Notes Advance Maths | 1st Edition | Bilingual | By Rakesh Yadav. Download - SD Yadav Math Book APK for Android sd yadav maths book pdf in english better