Hi
in4192 ..
The algorithm is quite complex to understand. The score depends on many aspects and some of them are- What level of questions you faced (did correct and incorrect), consecutive errors, time taken, how many easy wrong (huge punishment) and etc etc....
It could be that you solved some Medium level questions due to which you got Q31 with 16 incorrect. It could be possible that after many incorrect in the starting set, the algorithm decided your level and continuously gave you easy questions. Yes, you performed better but probably answered only easy questions.
In any case, you need to develop basic understanding of Quant. Q31 is a low score. Focus on your preparation and forget about GMAT algorithm for now. You can also check some online courses which comes with trial versions.
in4192
I had taken one official GMAT Practice Test in which I got a score of Score of 600. Quant out of 31 Qs i got 16 incorrect and in Qual out of 36 i got 16 incorrect.
I took another GMAT Practice Test today, in which my Quant was 9 incorrect out of 31, and Qual 13 incorrect out of 36. Clearly I performed much better but it still shows my score at 600.
How is that possible, can someone please explain? Thanks