Algebra 101 – part of the GMAT Math Book
Guide to Sequences and Progressions – thorough explanations of the topics
Manhattan GMAT Challenge Set 2 – 20 of the best MGMAT quant questions available for free
Verbal SC Notes – a good collection to help you prepare
710 (Q47, V41) – what worked and what didn’t
750 (Q47, V47) – my GMAT journey
Read the full article: Algebra 101, Guide to Sequences and Progressions, Manhattan GMAT Challenge Set 2, Verbal SC Notes, Share your GMAT Experience