[email protected] wrote:I´m having trouble understanding and answering some DS problems

Your situation is very common among people preparing for the GMAT. The truth of the matter is that EVERYONE struggles with Data Sufficiency (DS) questions at first. Keep in mind that this question type is unique to the GMAT, so it's totally foreign territory.

It just takes time for the concepts and strategies to become secondary, at which point you may come to find that DS questions are actually easier than Problem Solving questions.

I could start listing dozens of DS strategies and common mistakes (like confusing the answer to sufficiency question to the answer to the target question), but it's easier to just direct you to our free set of 16 videos that cover everything you need to know to tackle DS questions: https://www.gmatprepnow.com/module/gmat-data-sufficiency

Cheers,
Brent

Hi tanya_ba,

Data Sufficiency is the question type that is unique to the GMAT, so you probably have never faced a real-world 'equivalent' before you began your studies. Learning how to properly deal with the variations in DS takes time, but there are Tactics that you can use and patterns that you can learn to spot that should help you to improve. Your goal should NOT be to solve each question in under 2 minutes though - certain questions are designed to take you 3 minutes to solve (and that's if you KNOW what you're doing). Thus, your actual goal should be 'efficiency' - learning the proper Tactics to answer questions in the most efficient way possible.

1) How long have you been studying?
2) What materials have you used during your studies?
3) How well do you know the various Tactics (math, TESTing VALUES, Number Properties, Logic, etc.) for dealing with DS questions?

GMAT assassins aren't born, they're made,
Rich