Attempt:
Attempt all the questions whether you know the answer or not.
Neat and clean:
Answer sheet should be neat and clean. Do not forget to cut the rough work done. Avoid overwriting.
Observant:
Always...
Suppose there are 'n' number of different things. You would like to 'select' or 'arrange' all or some of those things in an order. In how many unique ways can you do so? Permutations and combinations is...
I will explain a simple and fastest process of multiplication. This can help you to get answers faster.
Let's assume you have to multiply 9999 X 2456.
Now think how much time it will take? Maybe 30...