To prepare for the IBPS RRB exam first thing should be to know the syllabus and exam pattern.
After knowing the syllabus, go throgh the List of the topics. and find your weak topics.
IBPS RRB prelims exam have been completed. and admit card for the IBPS RRB main exam is out .
Start to clear your basics for each topics in each section. Make a study plan to prepare all the section.
Keep revise all the notes.
Use short tricks, and learn formulas to solve the problems quickly.
The important things that are required are speed, accuracy and the time manage ment.\
keep practicing and be confident.
all the best.