go for brilliant tutorials study material it is most costly one than others but you have to give something to achieve.i have seen made easy study material and heard about other institute study materials that they are just for quick revision it means that you cant start fresh with these materials,if you have studied from standard books than you can follow other study materials just for revision and practice.
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In gate every subject carry the equal weightage. You can analysis last 10 years paper. To get good score your have to read all the subject.
Kanodia study material is best study material available on this earth. Along with standard text books read kanodia.
I Hats off to the rk kanodia. This book is a Miracle , covers all topics and MCQ's arranged in increasing order of difficulty and concept applications. A Must Have Book in ones shelf for GATE....