Hey Guys.
Sorry for my poor english, it's been a long time without writing any word in this language for me.
Here is my background. I'm a french student, enrolled in a pretty good institution, and I majored in economics and finance. I got pretty good grades this year (77% at my master degree, ranked 1st out of 165 students). So we can say that I'm used to manipulate formulas, calculations, algebra etc... Moreover, I took the toefl test last year, and I got 110 out of 120, with a well balanced score (29, 27, 27, 27).
I'm now preparing the Gmat since July, and I have to admit that I'm very disapointed with my results. Actually, I took my second Manahattan Gmat full test, and I only scored 590/800 (Quant: 44, Verbal: 29). The first test was quite similar with 590 (Quant: 46, Verbal: 26). These are really low (especially in verbal), and not compliant with my current target (Msc at the London School of Economics).
To be honest, I do not understand what is wrong with my work. When I'm working with OG 13th ed book, I got a majority of good answers (about 90% in quant and about 75% in verbal) on hard questions (number 100 and +). I also bought
Manhattan Gmat books, I read all of them excpected the Awa prep and the sentence correction prep, but it did not help me to improve my skills ! Moreover, I got some troubles to improve my score in quant. Actually, I made a list of my mistakes in order to focus on my weakness (Mostly Number properties, Combinatorics, Exponents). But even with a deeper preparation on these specific subjects, and a lot of specific exercices, I was not able to improve my Quant score (which is supposed to be my best part).
In brief, I do not understand why there is such a big difference between what I do on the OG book and the
MGMAT full test. Did anyone experienced such troubles ?
Thank you for your advice

Bye