In the recent board exams for ECEs, it was really surprising to know that there were questions about differential equations. Around 5 of them.
Some are asking me, what books would be very helpful for the board exams? Frankly, there is no particular book that can really used for mathematics in the board exams. What you can really do is practice and solve problems that may come out of the exams. There are topics however that are very common that usually come out. Here are the common topics:
Probability and statistics
Differential Calculus ( Calculus by Don&Don will be useful)
Remember that these topics are not the only topics you will find in the exams. These are just the common ones and you should take more considerations on these when you study.
So what are you waiting for? Christmas? Get your pen, papers and calculators and start crunching some numbers!