{"id":7090,"date":"2019-08-22T20:54:27","date_gmt":"2019-08-23T01:54:27","guid":{"rendered":"http:\/\/grockit.com\/blog\/gre\/?p=561"},"modified":"2020-09-11T20:41:21","modified_gmt":"2020-09-11T20:41:21","slug":"gre-quantitative-6-tips-for-speed-and-accuracy","status":"publish","type":"post","link":"https:\/\/wpapp.kaptest.com\/study\/gre\/gre-quantitative-6-tips-for-speed-and-accuracy\/","title":{"rendered":"6 Tips for Speed and Accuracy on the GRE Quantitative"},"content":{"rendered":"

For those of you who didn’t know, the GRE does not<\/em> allow a calculator. So, if you haven’t done math by hand for a while, you may have forgotten how to do many simple calculations. Here are some tips that will help you do math by hand quickly and accurately.\u00a0While these tips will help you on the entire test, you\u2019ll get the most out of them on the quantitative comparison section.
\n 
\n

1. Cross-multiply two fractions to compare them.<\/h4>
<\/div><\/div><\/div>
\nThe numerator with the larger product will belong to the larger fraction:
\nExample 1<\/strong>: 4 \/ 5 \u00a0vs. \u00a08 \/ 11
\nWhich fraction is bigger? I could change both to decimals, but let\u2019s try the cross-multiply method, which is much faster.
\n(4)(11)= 44 and (8)(5)= 40
\n44 is the larger product. Since the product involved 4, which is the numerator of 4\/5, 4\/5 is the bigger fraction.
\n

2. Squaring a fraction or decimal between 0 and 1 will make the number smaller.<\/h4>
<\/div><\/div><\/div>
\nExample 2:<\/strong> (1\/3)\u00b2 = 1\/9
\nWhile this tip is very simple to prove, it\u2019s crucial that you keep it in mind during the quantitative comparison section so that you can avoid unnecessary calculation.
\n

3. Taking the square root of a fraction or decimal between 0 and 1 will make the number larger.<\/h4>
<\/div><\/div><\/div>
\nExample 3:<\/strong> \u221a(\u00bc) = \u00bd
\n

4. Memorize these two formulas for dealing with division:<\/h4>
<\/div><\/div><\/div>
\na) <\/strong>(1\/x) \/ y = 1 \/ xy <\/strong>
\nb) <\/strong>1 \/ (x\/y) = y \/ x <\/strong>
\nStudents often fumble the calculations when presented with multiple layers of division or fractions. These simple formulas should keep you on track.
\nExample 4a<\/strong>:\u00a01\/2 \/ 3 = (\u00bd)(1\/3)=1\/6
\nExample 4b: <\/strong>1 \/ 2\/3 = 3\/2
\n

5. In order to find a percentage increase, find the difference between the original number and the increased (or decreased) number and divide that by the original number.<\/h4>
<\/div><\/div><\/div>
\nExample 5<\/strong>: A pair of pants was selling for $20 last week, but now is selling for $27 this week. By what percent did the price of the pants increase?
\n27 – 20 = 7
\n7 \/ 20 = 35 \/ 100 = 35 percent
\n

6. If you are asked to find x+y or x-y from a system of equations, you may want to try adding or subtracting the equations before solving for the variables.<\/h4>
<\/div><\/div><\/div>
\nThe GRE will often provide you with a simple method for solving a problem that will not be obvious. The challenge lies in finding the simplest method. Notice how the above problem was solved a lot faster by subtracting the equation than by solving for the variables.
\nExample 6<\/strong>: if 4x+2y=23 and 3x+3y=22, then x- y =
\nSet up the equations like you see below, and see if adding or subtracting will help you arrive at the answer more quickly. In this case, subtraction will do the trick.
\n4x + 2y = 23
\n–\u00a0 (3x+ 3y = 22)
\n————————-
\nx- y = 1.<\/p>\n

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\t\t\t

<\/span><\/p>\n<\/div>\n\t\t<\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"

For those of you who didn’t know, the GRE does not allow a calculator. So, if you haven’t done math by hand for a while, you may have forgotten how to do many simple calculations. Here are some tips that will help you do math by hand quickly and accurately.\u00a0While these tips will help you […]<\/p>\n","protected":false},"author":1,"featured_media":27071,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[68],"tags":[69],"_links":{"self":[{"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/posts\/7090"}],"collection":[{"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/comments?post=7090"}],"version-history":[{"count":2,"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/posts\/7090\/revisions"}],"predecessor-version":[{"id":34836,"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/posts\/7090\/revisions\/34836"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/media\/27071"}],"wp:attachment":[{"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/media?parent=7090"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/categories?post=7090"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpapp.kaptest.com\/study\/wp-json\/wp\/v2\/tags?post=7090"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}