Hi Guys - I recently took my GMAT after 2 weeks of preparation and didn't score well. I struggled in mainly 4 types of problems (as below) - - Coordinate Geo - Permutation and combinations - Probability - Sentence correction I decided to re-take my GMAT and need to score 650+ - Would appreciate BTG people (instructors and others) ideas/suggestions/materials to sharkpen my skills/knowledge about the above topics. Thanks !

For SC- refer to the MGMAT SC Strategy Guide; it is a must have resource if you want to master the concepts. For Permutations/Combination problems, perhaps you can refer to the 'Thursdays with Ron' series (https://www.manhattangmat.com/thursdays-with-ron.cfm) Good luck!

Hi OMGGMAT! Here are a few links you might find helpful! - Coordinate Geometry https://mathworld.wolfram.com/topics/Coo ... metry.html - Permutation and combinations/Probability https://www.manhattangmat.com/strategy-s ... bility.cfm https://gmatclub.com/blog/2010/02/knewto ... inatorics/ - Sentence correction Sadly, no shortcut here. You need to familiarize yourself the all of the common errors. The MGMAT SC book is a good idea, but you might like a supplemental grammar work. https://www.beatthegmat.com/spidey-s-sen ... s-t25.html Hope this helps!

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