I'm facing a different problem with Maths challenges, I'm able to finish most of test in 45 minutes but end up making mistakes (mostly in DS around 8 per test) questions. I dont think the errors are becuase i'm going too fast. I think there are more trap DS questions in challenges than GMAT prep or OG. I mean, there is no doubt these questions are good .... but they are testing more on trap situations than the Mathematical concepts....
Does anyone else feel the same way....
Test Correct Total % Correct Mean time Percentile
m01 --- 29 --- 37 --- 78.4% -- 1m 10s -- 84.3%
m02 --- 27 --- 37 --- 73.0% -- 1m 18s -- 47.3%
m24 --- 28 --- 37 --- 75.7% -- 1m 18s -- 73.3%
m25 --- 28 --- 36 --- 77.8% -- 1m 14s -- 73.9%