Hi All,
This is the consolidated "Thursdays with Ron" Quant and DS list.
Hope it helps!
December 3, 2009:
Quantitative: Combinatorics
https://vimeo.com/11327864December 17, 2009:
Quantitative: Efficient Choice of Variables in Word Problems, and Weighted Averages
https://vimeo.com/29282150February 4, 2010:
Quantitative: Backup Methods and General GMAT: Timing/Algorithm Related Problems
https://vimeo.com/11330152February 18, 2010:
Quantitative: Absolute Value Equations
https://vimeo.com/11365338March 18, 2010:
Quantitative: Inequality Workshop, Part 1
https://vimeo.com/11851326April 1, 2010:
Quantitative: Coordinate Geometry and Critical Reasoning: Decoding Prompts
https://vimeo.com/19846916April 29, 2010:
Quantitative: Rate/Time/Distance and Digits
https://vimeo.com/11874069May 27, 2010:
Quantitative: Inequality Workshop, Part 2
https://vimeo.com/12233170June 10, 2010:
Applications of Prime Factorizations
https://vimeo.com/12566201July 8, 2010:
Quantitative: Sequence Notation
https://vimeo.com/14640833July 22, 2010:
Quantitative: Probabilities and Verbal: Review of all Problem Types
https://vimeo.com/14646444October 21, 2010:
Quantitative: "IF" statements in Data Sufficiency Sentence Correction: Numerical comparisons
https://vimeo.com/16178195November 4, 2010:
Quantitative: problems on which traditional algebra doesnt work
https://vimeo.com/16699881February 17, 2011:
Quantitative: probability
https://vimeo.com/20347045March 17, 2011:
coordinate geometry data sufficiency
https://vimeo.com/21355454July 28, 2011:
Quantitative: Absolute Values and Unit Conversions
https://vimeo.com/27065964August 11, 2011:
Quant: Unit Conversion Problems, Rate problems with Hypothetical Cases, Mixture Problems
https://vimeo.com/28521880November 3, 2011:
Quant: Remainders
https://vimeo.com/32274958December 1, 2011:
Organization for Word Problems
https://vimeo.com/33370110December 15, 2011:
Averages: Sums and Sequences
https://vimeo.com/33988631January 19, 2012:
Ratios and Rates Problems
https://vimeo.com/35656995February 2, 2012:
Quant: Rate Problems Workshop
https://vimeo.com/36309533March 29, 2012:
Quant: Flexibility in Problem Solving, Part 1
https://vimeo.com/39703039April 12, 2012:
Quant: Inequalities Workshop Part 3
https://vimeo.com/40472732November 15, 2012:
Quant: Problems Involving Sums
https://vimeo.com/53709611January 10, 2013:
Quant: Problems on which algebra is not your friend
https://vimeo.com/57232848February 7, 2013:
Quant: Fractions, Percents, and Ratios
https://vimeo.com/59493043February 21, 2013:
Fractions, Percents, and Ratios (continued)
https://vimeo.com/60267534March 21, 2013:
Quant: Flexibility in Problem Solving
https://vimeo.com/62614124April 4, 2013:
Quant: Flexibility in Problem Solving Critical Reasoning: Passages Containing Statistics
https://vimeo.com/64313156Data Sufficiency:
January 20, 2011:
Data Sufficiency: Number Line Problems, part 2 Data Sufficiency: Problems with Unknown Angles
https://vimeo.com/19500975April 14, 2011:
A Firm Foundation for Data Sufficiency Coordinate Geometry DS, part 2
https://vimeo.com/22453684August 23, 2012:
Data Sufficiency: Testing Cases
https://vimeo.com/48398779September 13, 2012:
Data Sufficiency: Testing Cases (Part 2)
https://vimeo.com/50839191Bonus
August 5, 2010:
General GMAT: Timing Considerations
https://vimeo.com/17381745Cheers

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