Answers

2015-03-28T01:04:14+05:30
1. Using vedic maths 
2. deriving your own shortcuts
3. memorizing more and more things that you can
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2015-03-28T06:44:49+05:30
If you want your problems to be solved quickly, practice is the best tool. Solve as many questions as you can, do it daily. Very soon you will notice that the problems are getting solved quicker.
Also focus on formula that is going to be used in the question.
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