406KiB, 1120x610, .xdp-bro.png-4Vbqtn.png View SameGoogleiqdbSauceNAO Number of exercises Anonymous Mon 22 Mar 16:49:57 2021 No.12868169 ViewReplyOriginalReport Quoted By: >>12868233 What is /sci/ average number of exercises for retention and understanding? I do the 20th hardest from the end of a chapter, that's usually enough.