I took two GMAT prep tests and I am bit surprised with the variation in Quant. Second GMAT prep test I took today clearly felt harder. I just reviewed all Qs and only indication is that I got Q 11 to 17 incorrect in a row.
GMAT Prep-1 : Q47, V35 - 660
MGMT CAT: Q41, V38 - 650
Today: GMAT Prep-2 : Q39, V39 - 640 (I worked on verbal so I clearly see difference)
The reason I am taken a back is because after getting only 2 incorrect in first 10 - I clearly felt I was getting fairly harder questions back to back. I was behind on time so some of the incorrects between 11 to 17 are near guesses. Ironically, in first exam I never found questions to get to this level of difficulty - yet scored 47. I did look at type of questions I got wrong and they are from range of topic. I am not convinced with a specific topic has greater trend of weakness other then probability.
So I was wondering if anyone had a similar issue - My learning is simple: Never run too behind on time to have to guess multiple, and secondly if you plan to guess - just guess - spending 30 second and guess hardly has increased success rate. Nonetheless, I just find my first GMAT Prep was just much easier and it seems odd to get to 47 then. I was actually not happy with my quant performance in first test as I made a few casual mistakes and was surprised to see 47. Any insight appreciated from other's experiences.