x am idea is one of the best book for boards preparation.. I higly recommend this book to class 10 std because this book is very beneficial for revising chapter doing mcq praticesing assertion reason and case based. this book help me to score 100 marks in science board exam. It's has 6 main
chapter where most chances of questions going to come. it is very easy to score full marks in theory but difficulty is mcq of 16 marks so please go with thia book