GMATQuantum Course
Absolute Value Algebra Algebra AMC Android App angles Area Arithmetic Arithmetic Manipulations Arithmetic Sequence Average Border Careless Mistakes Chords Circles Combinations Coordinate Geometry Counting Cubes Data Sufficiency Decimals Diophantine Equations Distance/Rate/Time Divisibility Double Sets Dvisibility Exam Pack 2 Exponents External Angles Factorial Flexible Thinking Fractional Exponents Fractions Functions Geometric Sequences Geometry GMAC GMAT GMAT Exam Pack 1 GMAT Official Guides GMAT Paper Tests GMAT Quant Review 2016 GMAT Quantitative Review 2017 GMAT Strategy GMAT Verbal GMATPrep GMATPrep 2.0 GMATPrep Exam Pack 2 GMATPrep Exam Pack1 GMATPrep Question Pack 1 GMATPrep Software Hexagon Identities Identities: Difference of Squares Inequalities Integrated Reasoning Integrated Reasoning Intercept Linear equations Lines Maximum Mean Median Mixtures Multiples Number Theory Official GMAT Guide 2018 Official GMAT Integrated Reasoning Prep Tool Official Guide 10 Official Guide 13 Official Guide 14 Official Guide 2015 Official Guide 2016 Official Guide 2017 Official Guide for GMAT Review 2015 Official Guide GMAT 13th Edition Official Guide GMAT 2015 OOfficial Guide for GMAT Review 2018 Overlapping Sets Pacing Parabola Patterns Pentagon Percent Change Percents Permutations Polygon Prime Factors Probability Problem Solving Skill Quadratics Radicals Range Ratio Reading Comprehension Rectangles Remainders Right triangles Score Cancellation sequence Sequences Sequences Slope Statistics System of Equations Triangles Triple Venn diagrams Undefined expressions Venn Diagrams Word Problems YouTube Offline

How to do Arithmetic Manipulations?

In the video below I show you how to go about doing arithmetic manipulations on GMAT Math problems. All of the GMAT problems are meant to be solved without a calculator, and the test writers ensure that the numbers are "nice", meaning that minimal grunt calculations need to be done. However, there are some specific guidelines on how to go about this. Below I list some of these points and illustrate them further in the video:

  • Only do divisions after you have reduced the fractions. Almost of all of the divisions are based on dividing by a single digit number, this means that you may end up with problems that have a two digit number in the denominator, but first reduce the expression.
  • Don't multiply unless you have reduced all the fractions or expressions.
  • Know the times table from 2 to 11. It is not necessary on the GMAT to know times table higher than 11.
  • If you see the following phrases: approximately equal to, most nearly equal to, or closest to, then recognize that it is an approximation problem. This means you need to replace the terms with "nice" numbers, for example if you have 0.487, then you replace it with 0.5.

Video Illustrating Arithmetic Manipulations on three Official GMAT problems:

Reader Comments

There are no comments for this journal entry. To create a new comment, use the form below.

PostPost a New Comment

Enter your information below to add a new comment.

My response is on my own website »
Author Email (optional):
Author URL (optional):
Some HTML allowed: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <code> <em> <i> <strike> <strong>