<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:sy="http://purl.org/rss/1.0/modules/syndication/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" > <channel> <title>GRE Code – GRE</title> <atom:link href="https://www.manhattanprep.com/gre/blog/tag/gre-code/feed/" rel="self" type="application/rss+xml" /> <link>https://www.manhattanprep.com/gre</link> <description>GRE Prep | Best GRE Test Preparation | Manhattan Prep GRE</description> <lastBuildDate>Fri, 30 Aug 2019 16:40:12 +0000</lastBuildDate> <language>en-US</language> <sy:updatePeriod> hourly </sy:updatePeriod> <sy:updateFrequency> 1 </sy:updateFrequency> <generator>https://wordpress.org/?v=6.3.2</generator> <item> <title>GRE Math for People Who Hate Math: Cracking the GRE Code</title> <link>https://www.manhattanprep.com/gre/blog/gre-math-cracking-gre-code/</link> <dc:creator><![CDATA[Chelsey Cooley]]></dc:creator> <pubDate>Wed, 20 Jun 2018 21:57:40 +0000</pubDate> <category><![CDATA[Current Studiers]]></category> <category><![CDATA[GRE Prep]]></category> <category><![CDATA[GRE Quant]]></category> <category><![CDATA[GRE Strategies]]></category> <category><![CDATA[How To Study]]></category> <category><![CDATA[Math]]></category> <category><![CDATA[Study Tips]]></category> <category><![CDATA[GRE Code]]></category> <category><![CDATA[GRE Math for People Who Hate Math]]></category> <guid isPermaLink="false">https://www.manhattanprep.com/gre/?p=11608</guid> <description><![CDATA[<p>The GRE will never lie to you—but it doesn’t always tell you what you really want to know. The GRE is a little bit like my friend in this exchange: Me: “What do you think of this outfit?” My friend: “Well, it’s very… creative.” Sure, it’s not like she lied (zebra-striped leggings are pretty creative). […]</p> <p>The post <a rel="nofollow" href="https://www.manhattanprep.com/gre/blog/gre-math-cracking-gre-code/">GRE Math for People Who Hate Math: Cracking the GRE Code</a> appeared first on <a rel="nofollow" href="https://www.manhattanprep.com/gre">GRE</a>.</p> ]]></description> <content:encoded><![CDATA[<p><img decoding="async" fetchpriority="high" class="alignnone size-full wp-image-11765" src="https://cdn2.manhattanprep.com/gre/wp-content/uploads/sites/19/2018/06/gre-math-for-people-who-hate-math-cracking-gre-code-chelsey-cooley.png" alt="Manhattan Prep GRE Blog - GRE Math for People Who Hate Math: Cracking the GRE Code by Chelsey Cooley" width="1200" height="628" srcset="https://cdn2.manhattanprep.com/gre/wp-content/uploads/sites/19/2018/06/gre-math-for-people-who-hate-math-cracking-gre-code-chelsey-cooley.png 1200w, https://cdn2.manhattanprep.com/gre/wp-content/uploads/sites/19/2018/06/gre-math-for-people-who-hate-math-cracking-gre-code-chelsey-cooley-300x157.png 300w, https://cdn2.manhattanprep.com/gre/wp-content/uploads/sites/19/2018/06/gre-math-for-people-who-hate-math-cracking-gre-code-chelsey-cooley-768x402.png 768w, https://cdn2.manhattanprep.com/gre/wp-content/uploads/sites/19/2018/06/gre-math-for-people-who-hate-math-cracking-gre-code-chelsey-cooley-1024x536.png 1024w" sizes="(max-width: 1200px) 100vw, 1200px" /></p> <p><span style="font-weight: 400;">The GRE will never lie to you—but it doesn’t always tell you what you really want to know. The GRE is a little bit like my friend in this exchange:</span><span id="more-11608"></span></p> <p style="padding-left: 30px;"><span style="font-weight: 400;">Me: “What do you think of this outfit?”</span></p> <p style="padding-left: 30px;"><span style="font-weight: 400;">My friend: “Well, it’s very… creative.”</span></p> <p><span style="font-weight: 400;">Sure, it’s not like she lied (zebra-striped leggings </span><i><span style="font-weight: 400;">are</span></i><span style="font-weight: 400;"> pretty creative). But she also didn’t come right out and call me a fashion victim. In order to work that out, I had to crack the code. </span></p> <p><span style="font-weight: 400;">You already know how to “crack the code” in English. Codebreaking is how we figure out what people really mean, even though we exaggerate, simplify, avoid touchy topics, and change the subject. And on the test, codebreaking is how you start to understand a GRE Math problem. </span></p> <p><span style="font-weight: 400;">Here’s an example of a GRE Math problem that’s full of code:</span></p> <p style="padding-left: 30px;"><span style="font-weight: 400;">What is the largest integer </span><i><span style="font-weight: 400;">n</span></i><span style="font-weight: 400;"> such that 5</span><span style="font-weight: 400;"><sup>n</sup></span><span style="font-weight: 400;"> is a factor of 10!?</span></p> <p style="padding-left: 60px;"><span style="font-weight: 400;">1. …</span></p> <p style="padding-left: 60px;">2. …</p> <p><span style="font-weight: 400;">This problem looks fairly intimidating, but if it just said what it meant in plain English, it’d be a lot easier. The people who write GRE Math problems </span><i><span style="font-weight: 400;">want</span></i><span style="font-weight: 400;"> to intimidate you a little, if they can—that way, they can reward people who calm down, take a deep breath, and focus on what the problem really means. Let’s do exactly that right now.</span></p> <p><span style="font-weight: 400;">10! is pronounced as “10 factorial,” and it’s code for a very large number: the number you’d get by multiplying 10, times 9, times 8, times 7, and all the way down to 1.</span></p> <p><span style="font-weight: 400;">If something is a factor of 10!, you can divide 10! evenly by that number. For instance, 2 is a factor of 10!. So is 20.</span></p> <p><span style="font-weight: 400;">We really want to know whether 5</span><span style="font-weight: 400;"><sup>n</sup></span><span style="font-weight: 400;"> divides evenly into this large number. 5</span><span style="font-weight: 400;"><sup>n</sup></span><span style="font-weight: 400;"> is code too. An exponent just refers to a number such as 5, 5×5, 5x5x5, 5x5x5x5, or any number of 5s multiplied together. Since the problem asks about the </span><i><span style="font-weight: 400;">largest integer n</span></i><span style="font-weight: 400;">, you’re looking for the </span><i><span style="font-weight: 400;">largest</span></i><span style="font-weight: 400;"> number of 5s that you can possibly divide evenly into 10!. </span></p> <p><span style="font-weight: 400;">So, here’s what the problem says now:</span></p> <p style="padding-left: 30px;"><span style="font-weight: 400;">10x9x8x7x6x5x4x3x2x1 can be evenly divided by 5x5x…x5. What is the largest number of 5s that can be evenly divided into the larger number?</span></p> <p><span style="font-weight: 400;">“Divisible” or “evenly divided” is code as well. If you want to know if one number is divisible by another number, here’s a great way to do it. Write a fraction, with the bigger number on the top and the smaller number on the bottom. Start simplifying that fraction, a little bit at a time. If you can cross off the entire bottom of the fraction, you know the number is divisible. If you can’t, it isn’t divisible. </span></p> <p><span style="font-weight: 400;">If we were solving this problem, we’d write our fraction like this:</span></p> <p><img decoding="async" class="alignnone size-full wp-image-11609" src="https://cdn2.manhattanprep.com/gre/wp-content/uploads/sites/19/2018/06/cc-73-image-1.png" alt="Manhattan Prep GRE Blog - GRE Math for People Who Hate Math: Cracking the GRE Code by Chelsey Cooley" width="213" height="80" /></p> <p><span style="font-weight: 400;">How many 5s can be crossed off on the bottom? As many 5s as there are on the top. Notice that 10 can be rewritten as 5 times 2.</span></p> <p><img decoding="async" class="alignnone size-full wp-image-11610" src="https://cdn2.manhattanprep.com/gre/wp-content/uploads/sites/19/2018/06/cc-73-image-2.png" alt="Manhattan Prep GRE Blog - GRE Math for People Who Hate Math: Cracking the GRE Code by Chelsey Cooley" width="239" height="80" /></p> <p><span style="font-weight: 400;">So, there are exactly two 5s on the top of the fraction. The answer to the problem is 2: 10! is divisible by 5²</span><span style="font-weight: 400;">.</span></p> <p><span style="font-weight: 400;">Here’s what the GRE Math problem really said, ignoring all of the code:</span></p> <p style="padding-left: 30px;"><span style="font-weight: 400;">In total, how many 5s can be divided out of the numbers 10, 9, 8, 7, 6, 5, 4, 3, 2, and 1?</span></p> <p><span style="font-weight: 400;">You aren’t supposed to go through all of that codebreaking on GRE test day. There just isn’t time. If you see a GRE Math problem that has code you don’t know how to translate, consider guessing and moving on. But, here’s why codebreaking is still important: </span><b>if you do it ahead of time, you’ll recognize the code quickly when you see it on the test.</b></p> <p><span style="font-weight: 400;">If anything about the problem we just did was surprising or challenging for you, take a moment to make some flashcards. On the front of the flashcard, write a piece of code you could see in a problem. On the back, write out what it </span><i><span style="font-weight: 400;">really</span></i><span style="font-weight: 400;"> means. Here are the flashcards that I’d make for this GRE Math problem:</span></p> <p><img decoding="async" loading="lazy" class="alignnone size-full wp-image-11611" src="https://cdn2.manhattanprep.com/gre/wp-content/uploads/sites/19/2018/06/cc-73-image-3.png" alt="Manhattan Prep GRE Blog - GRE Math for People Who Hate Math: Cracking the GRE Code by Chelsey Cooley" width="622" height="620" srcset="https://cdn2.manhattanprep.com/gre/wp-content/uploads/sites/19/2018/06/cc-73-image-3.png 622w, https://cdn2.manhattanprep.com/gre/wp-content/uploads/sites/19/2018/06/cc-73-image-3-150x150.png 150w, https://cdn2.manhattanprep.com/gre/wp-content/uploads/sites/19/2018/06/cc-73-image-3-300x300.png 300w" sizes="(max-width: 622px) 100vw, 622px" /></p> <p><span style="font-weight: 400;">Let’s practice some codebreaking and get a few more flashcards made. Here are some snippets of “GRE code.” Take your time and work out what they’re really saying, in plain English. Then, make a flashcard or two for each one. </span></p> <ol> <li style="font-weight: 400;"><span style="font-weight: 400;">xy ≠ 0</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">x is divisible by 6, but not by 12</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">x²</span><span style="font-weight: 400;"> + 1 is odd</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">p has exactly two factors</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">p has an odd number of factors</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">a²</span><span style="font-weight: 400;">/b < 0</span></li> </ol> <p><span style="font-weight: 400;">Try it out, and let us know what you think in the comments! ?</span></p> <hr /> <p><b><i>See that “SUBSCRIBE” button in the top right corner? Click on it to receive all our GRE blog updates straight to your inbox!</i></b></p> <hr /> <p><b><i><em><strong><a id="bloglink" href="https://www.manhattanprep.com/instructors/chelsey-cooley/" target="_blank" rel="noopener noreferrer">Chelsey Cooley</a><a href="https://www.manhattanprep.com/instructors/chelsey-cooley/?utm_source=manhattanprep.com%2Fgre%2Fblog&utm_medium=blog&utm_content=CooleyBioGREBlog&utm_campaign=GRE%20Blog" target="_blank" rel="noopener noreferrer"><img decoding="async" loading="lazy" class="alignleft" title="Chelsey Cooley Manhattan Prep GRE Instructor" src="https://cdn2.manhattanprep.com/gre/wp-content/uploads/sites/19/2015/11/chelsey-cooley-150x150.jpg" alt="Chelsey Cooley Manhattan Prep GRE Instructor" width="150" height="150" data-pin-nopin="true" /></a> is a Manhattan Prep instructor based in Seattle, Washington.</strong> </em></i></b><i><em>Chelsey always followed her heart when it came to her education. Luckily, her heart led her straight to the perfect background for GMAT and GRE teaching: she has undergraduate degrees in mathematics and history, a master’s degree in linguistics, a 790 on the GMAT, and a perfect 170Q/170V on the GRE. </em></i><i><em><a id="bloglink" href="https://www.manhattanprep.com/gre/classes/#instructor/48" target="_blank" rel="noopener noreferrer">Check out Chelsey’s upcoming GRE prep offerings here</a>.</em></i></p> <p>The post <a rel="nofollow" href="https://www.manhattanprep.com/gre/blog/gre-math-cracking-gre-code/">GRE Math for People Who Hate Math: Cracking the GRE Code</a> appeared first on <a rel="nofollow" href="https://www.manhattanprep.com/gre">GRE</a>.</p> ]]></content:encoded> </item> </channel> </rss>