Mixtures Articles
Using “Word Equations” to Help Write Algebraic Equations
Algebraic techniques can often help us solve word problems. The process typically involves assigning one or more variables, writing an equation (or two or three), and then solving that equation. [...]
How to Make Weighted Average Problems Easy
Most people don’t like weighted averages, and for good reason. The formula is complicated, and these often come in the form of “story” problems, which are hard to set up. [...]
Breaking Down GMATPrep Average + Arithmetic Problems
In the past, we’ve discussed weighted average Data Sufficiency problems (twice: first here and then here ) and we’ve also discussed how to turn algebra problems into arithmetic problems . [...]
How to Analyze a GMATPrep Data Sufficiency Question
This is the latest in a series of “How To Analyze” articles that began with the general “ How To Analyze A Practice Problem ” article (click on the link [...]