Please purchase UNIVERSAL's Guie for DU Law Entrance Examination. It is a good book. Available with all the book sellers near the DU Law Faculty.
Keep a mock answer sheet containing cells numbered 1 to 200 or so and a blank space against each of it for giving your answer. (In fact one can get a number of such sheets prepared in EXCEL and keep handy).
Note the starting time. Take the test papers given in the Universal's guide one by one. Note the answer against the question in the sheet mentioned above. IF YOU ARE NOT SURE ABOUT ANY ANSWER PLEASE LEAVE THE SAID QUESTION AND GO TO THE NEXT. DO NOT GUESS - IT WILL CARRY NEGATIVE MARKS.
After finishing the question paper - NOTE the finishing time.
Now see the Answer to the respective Test paper given at the fag end of the Guide. Verify your answer. For every right answer award 4 marks. For every negative answer deduct 1 mark. Initially even if your marks are very poor, do not panic. Persist with it. Over the time, you will master.
Make a tally. By this method, you will go on improving your tally. If your tally is consistently 325 and above, you will get sure success in the entrance exam and also admission.
LAST BUT NOT THE LEAST, wherever you are not sure about the answer, or where you made a mistake in answering, verify the answer sheet and try to catch up with the correct answer!
By this method, you will ensure that while your current GK fetches you the marks which you arrived at, you will also get to know the answers for the questions which you have left and the ones which you answered wrong.
THE ABOVE EXERCISE WILL ENSURE YOUR SUCCESS! BEST OF LUCK.