Hi
Paumilpatel,
Thanks for sharing your GMAT Focus experience, and congrats on your very solid 635 (85%) starting score.
Considering that there are only 30 points available per GMAT Focus Quant, Verbal, and Data Insights section (60-90), losing 6 points on Quant (20% of the available points) for just 1 question wrong (less than 5% of the 21 questions) is indeed insanity.
On the other side of the Focus scoring curve, however, I've seen students losing nearly as little as a
half-point per question. For example, a private tutoring student recently scored
Q87 with 2 wrong, V88 with 2 wrong, and DI82 with 7 wrong.
Presumably, these students earned harder questions overall, due to the question adaptive scoring algorithm, and perhaps also benefitted from the additional section adaptivity of the GMAT Focus.
There is also another consideration: when you answer an easy question wrong, you lose more points than when you answer a hard question wrong (and vice versa). Perhaps you made a careless mistake on what GMAC considered an easy/medium question.
There some is good news, however: for example, to state the obvious,
you are only one question away from a perfect 90/90 on Quant! Your overall Quant percentile (85%) is also very strong, and is comparable to a Q50/51 (86%) on the classic GMAT.
For your reference, I've also posted images below of the GMAT Focus (top) and GMAT classic (bottom) percentile tables for Quant.
Any chance you could post the actual images of your ESR? Thanks!