This winsome book is specially published for the aspirants of Combined Higher Secondary Level (CHSL) TIER-I Recruitment Exam organised by Staff Selection Commission (SSC). The book comprises, along with the latest study and practice material, Solved Previous Years' Papers which will prove extremely useful for readers to be well-conversant with the exam pattern, the type of questions asked and their answers. Salient Features of the Book: • The book contains specialised study and practice material on all the relevant subjects important from the point of view of the exam. • The book will prove very useful for study and self-practice, and during the precious moments before the exam for quick grasp and reference purposes. • It will also serve as a true test of your studies and preparation for the exam with actual exam-style questions and numerous practice questions given in exhaustive exercises. All questions are solved by respective subject experts with due diligence.