Additionally, prior to this type of testing, just take some time to read the questions carefully and first understand them. Then analyze the problem, write your analysis on paper then solve the problem. As you go along, try to reduce the problem solving time while practicing. Time is an important criteria in any competitive exam. So concentrate on time also.
Hope that you crack the written tests by companies soon.
All the very best.
Scalability is a desirable property of a system a network,or a process, which indicates its ability to either handle growing amounts of work in a graceful manner or to be readily enlarged.
1. For Maths, go through the books of 6th to 12th standard. It is more than enough. Check the related questions from R.S. Aggarwal's book titled "Quantitative Apptitude".
2. For Logical Reasoning, just analyse the given problem twice or thrice before answering.
3. Update yourself on current happenings by reading Newspapers.
More important, do not feel downhearted if you failed to achieve success in a previous aptitude test because that will have helped you to prepare for the upcoming success.
All the best!