I've tried Delta Course. I wouldn't recommend it, unless you really want to master permutations and combinations. Since these subjects are infrequently tested on the GMAT, the benefit of taking this course is only marginal.lanter1 wrote:Has anyone tried the the Delta Course for advanced prep in quant? I am trying to take my quant from 45 to 48+. Do you think it will help?
Stick to Kaplan and Kaplan 800.

















