QR Prep Advice Needed....

[fuggazi]

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I'm using Kaplan, Destoyer, Achiever and Topscore to prepare for the QR section of the DAT. Is that sufficient to score at least a 20 on the QR? I may throw in more practice from mock exams if I have time, but time is running out! Oh also, are the QR problems on the DAT comparable to GMAT or GRE problems or both????