This is the only book which I follow for ssc and upsc exam.one of the main advantage of this book is that it covers all previous year question of all comptetive exams.i follow this book and qualify for ssc pre.it covers all topics related to banking exam also.i think anyone who is seriously preparing for any exam must purchase this book for practise all previous year question.it, s mensuration portion is very helpful in ssc upsc.percentage chapter is also covered all type of question.we must complete this book atleast once. before appearing in exam