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## Data Sufficiency - Using Ratios

We know that ratios are the building blocks for a lot of other concepts such as time/speed, work/rate and mixtures. As such, we spend a lot of time getting comfortable with understanding and manipulat...

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## Data Sufficiency - How to Arrive at Answer (E)

Today we will discuss a problem we sometimes face while attempting to solve Data Sufficiency questions for which the answer is actually E (when both statements together are not sufficient to answer th...

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## Data Sufficiency - Can We Avoid Calculations?

We have already discussed how to solve equations with the variable in the denominator. We also said that the technique generally works for PS questions but you need to be careful while working on DS q...

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## Data Sufficiency - Use Number Line for Number Properties

Here is an often-repeated complaint we hear from test takers – Data Sufficiency questions that deal with number properties are very difficult to handle (even for people who find problem-solving number...

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## Data Sufficiency - Easy (A)/(B) Trap Questions

We know that ‘Easy C’ is a common trap of DS questions – have you wondered whether there could be trap called ‘Easy A/B’ such that the answer would actually be (C)? Such questions also exist!

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## Data Sufficiency - Using Data from One for Another (Going from 48 to 51)

Another method of saving time on simple questions – use data given in one statement to examine the other! Now you might think we have lost it! After all, you know very well that in Data Sufficiency qu...

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## Data Sufficiency - How to Get Multiple Answers

Today we will discuss a problem we sometimes face while attempting to solve Data Sufficiency questions for which the answer is option (E). What happens when it is not very intuiti