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Data Sufficiency Strategy

This topic has 1 expert reply and 0 member replies

Data Sufficiency Strategy

Post Mon Sep 04, 2017 4:43 pm
A lot of student struggle more with Data Sufficiency than with Problem Solving. This is often because they don't have a solid DS strategy - they're still trying to solve them in the same way they solve PS.

Here are some helpful articles to help you reframe your thinking and your approach to DS questions:

How DS Works: http://www.manhattanprep.com/gmat/blog/2013/01/24/how-data-sufficiency-works/

Rephrasing DS to Answer the RIGHT Question: https://www.manhattanprep.com/gmat/blog/2011/05/06/rephrasing-data-sufficiency-questions/

Common DS Traps: https://www.manhattanprep.com/gmat/blog/2012/07/31/4-common-types-of-data-sufficiency-traps/

Why am I better at PS than DS? https://www.manhattanprep.com/gmat/blog/2016/08/04/why-am-i-better-at-gmat-problem-solving-than-data-sufficiency/

Test Cases: https://www.manhattanprep.com/gmat/blog/2014/11/25/gmat-data-sufficiency-strategy-test-cases/

Avoiding the C-Trap: https://www.manhattanprep.com/gmat/blog/2014/04/16/avoiding-the-c-trap-in-data-sufficiency/

Why Geometry DS is Harder: https://www.manhattanprep.com/gmat/blog/2016/05/13/heres-why-youre-getting-geometry-problems-on-gmat-data-sufficiency-wrong/

Draw It Out: https://www.manhattanprep.com/gmat/blog/2014/04/10/save-time-and-eliminate-frustration-on-ds-draw-it-out/

Giveaway DS Statements: https://www.manhattanprep.com/gmat/blog/2013/06/18/giveaway-data-sufficiency-statements/

The Importance of Getting "No": https://www.manhattanprep.com/gmat/blog/2015/07/30/the-importance-of-getting-to-no-on-the-gmat-part-1/

Here's Why You're Missing DS Problems: https://www.manhattanprep.com/gmat/blog/2015/11/03/heres-why-you-might-be-missing-gmat-data-sufficiency-problems-part-1/

Avoiding Calculations on DS: https://www.manhattanprep.com/gmat/blog/2016/01/05/avoiding-calculations-on-gmat-data-sufficiency/

Yes/No DS Questions: https://www.manhattanprep.com/gmat/blog/2017/06/08/why-do-we-care-about-yesno-data-sufficiency-questions/

Follow Your Process: https://www.manhattanprep.com/gmat/blog/2016/06/24/gmat-data-sufficiency-follow-your-process-part-1/

The Goldilocks Method: https://www.manhattanprep.com/gmat/blog/2013/05/20/another-way-to-solve-data-sufficiency-value-problems-the-goldilocks-method-finding-a-number-thats-just-right/

_________________


Ceilidh Erickson
Manhattan Prep GMAT & GRE instructor
EdM in Mind, Brain, and Education
Harvard Graduate School of Education


Manhattan Prep instructors all have 99th+ percentile scores and expert teaching experience.
Sign up for a FREE TRIAL, and learn why we have the highest ratings in the GMAT industry!

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Post Mon Sep 04, 2017 5:13 pm
And here are some BTG threads that reveal some common DS mistakes / good DS strategy:

http://www.beatthegmat.com/how-do-i-make-d-s-questions-click-t281564.html#737862

Mistaking the Question as a Given:
http://www.beatthegmat.com/are-we-really-sure-xy-0-issue-t161026.html#555696
http://www.beatthegmat.com/ds-query-t276597.html#719495

Statements are Always True:
http://www.beatthegmat.com/can-vs-yes-no-t173285.html#571897

Statement Carryover (aka accidentally applying what you knew from statement 1 to statement 2):
http://www.beatthegmat.com/gmat-og-13-t241746.html#653748
http://www.beatthegmat.com/need-help-solving-a-problem-t276574.html#719496

Testing Cases / Proving Insufficiency:
http://www.beatthegmat.com/manhattan-advanced-quant-pg-84-8-t166829.html#563825
http://www.beatthegmat.com/questions-that-require-testing-values-too-slow-t151051.html#561400
http://www.beatthegmat.com/is-z-between-x-and-y-t276839.html#792014
http://www.beatthegmat.com/is-the-product-of-two-positive-integers-x-t295898.html#796047
http://www.beatthegmat.com/tricky-1-from-prep-t275942.html#717206

A Definitive "No" Answer = Sufficient
http://www.beatthegmat.com/ds-first-timer-t240767.html#653772
http://www.beatthegmat.com/data-sufficiency-question-type-t274961.html#714088

Unpack / Rephrase the Question:
http://www.beatthegmat.com/is-x-x-2-x-4-divisible-by-12-t276379.html#718647
http://www.beatthegmat.com/if-x-y-is-x-y-1-x-0-2-t295200.html#793303

Pay Attention to Constraints:
http://www.beatthegmat.com/a-of-b-of-c-an-integer-t283777.html#747062

Avoid C-Traps:
http://www.beatthegmat.com/og-13-156-t289252.html#766502

_________________


Ceilidh Erickson
Manhattan Prep GMAT & GRE instructor
EdM in Mind, Brain, and Education
Harvard Graduate School of Education


Manhattan Prep instructors all have 99th+ percentile scores and expert teaching experience.
Sign up for a FREE TRIAL, and learn why we have the highest ratings in the GMAT industry!

Free Manhattan Prep online events - The first class of every online Manhattan Prep course is free. Classes start every week.

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