I was trying to find out if the scores improve after doing some papers ? I.e If DD scores 80% on first paper will she score more after doing few papers of the same subject ( same level of difficulty) ?
I think Peridot is right and what she is explaining is that after every paper, sit with your DC and review her mistakes. Then do the question with the child, explaining the technique of that type of VR or NVR question. Once the techniques are learnt well, the scores will vastly improve as well as will take less time. However, do not repeat the same paper again for few weeks as children often remember the answers and you would not be able to make a good assessment of their ability. Keep some papers to be done in just a month before the test, so that child gets to do some thing new in the run up to the tests.