Angles and Arguments

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Arithmetic - Avoiding Variables in Work Rate

Those of you who have studied my approaches and methods know that I do not like to take variables. In GMAT questions, often I do not take any variables, rarely I take one and never

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Algebra - Benefits of Using GP Concepts

Today we will discuss an algebra question on sequences in detail and look at two different approaches – one without using Geometric Progression formula and another with the formula.

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Arithmetic - Pattern Recognition in Number Properties

Let’s discuss a tricky little question today. It is best done using divisibility and remainders logic we discussed in our divisibility module. But what happens if you blank out on

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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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Algebra - Breaking Down Complex Inequalities

Sometimes, our given inequalities involve multiple signs such as a < b < c. How do we handle these complex inequalities? To put it simply - one at a time. This is nothing but two inequalities put

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Arithmetic - Applying Work Rate Concepts

If A and B work together and take n days to complete a work, and if we know that their rate of work is same, each will individually take 2n days to complete the same work. When both

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Algebra - Noticing Patterns While Plugging Numbers

We have talked about knowing which numbers to plug-in in case you want to use the number–plugging method. To be more exact, we discussed that you need to find the transition points i.e. the points whe...

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Algebra - Importance of Transition Points in Number Plugging

This is especially useful in questions where you are tempted to plug in values. A question often asked is: how do I know which values to plug and how do I know that I have covered the entire range in...

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Combinatorics - When Does Order Matter?

I have to admit that probability is confusing. The problem is not so much that students find it hard to understand as that instructors find it hard to explain. There are subtle points in a probability...

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Algebra - When You Cannot Make Equations

If you have been practicing GMAT questions for a while, you will realise that not every question can be solved using pure algebra, especially at higher levels. There will be questions that will requir...

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Arithmetic - Avoiding Variables in Work Rate

Algebra - Benefits of Using GP Concepts

Arithmetic - Pattern Recognition in Number Properties

Data Sufficiency - Can We Avoid Calculations?

Algebra - Breaking Down Complex Inequalities

Arithmetic - Applying Work Rate Concepts

Algebra - Noticing Patterns While Plugging Numbers

Algebra - Importance of Transition Points in Number Plugging

Combinatorics - When Does Order Matter?

Algebra - When You Cannot Make Equations

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