Pick Up How To Top Exams And Enjoy Studies Edited By Dhaval Bathia Digital Copy

Must read it if you are a student, It is very helpful for competitive exams as the name says its for students, I would say if you want more mental math tricks some of which are given in this book you should read the same author's book on vedic mathematics.
fgnhgbhdfhbdfhdfsfghdf This book contains a bunch of tips and tricks to improve your speed and accuracy while preparing and appearing for exams, Some of them are

Speed multiplication
Instant Squaring
Time management
NRT/FRTRevision Techniques
Speed reading and writing
Memory Tricks
Exam Tips
A talk with Moderatorthose who check board papers

A good complimentary book but not necessary for preparing exams.
Thest one I ever read and the bibliography has been a blessing in disguise, Not read yet let's see if it allows to read for free or I have to buy it,