Practice for GRE Multiple-Choice Questionsįor question 3, select one answer from the list of five answer choices.ģ. Because Quantity A is not always greater, choice (A) can now be eliminated. In this case, however, the quantities are equal. Again, these numbers satisfy the equation provided in the problem. When choosing a second set of numbers, try something less common such as making a = b = 1. Because Quantity B is not always greater nor are the two quantities always equal, choices (B) and (C) can be eliminated. These numbers satisfy the equation as 8 2 = 4 3 = 64. Try different integers for a and b that satisfy the equation a 2 = b 3 such as a = 8 and b = 3. See the AnswerĪnswer: (D) The relationship cannot be determined from the information given. To solve, cross-multiply to get 71x + 71 = 70x + 75. Substituting this information into the formula gives: In this formula, 71 is the average, 70x + 75 is the total, and there are x + 1 days.
Next, use the average formula to find the value of x: The sum of the high temperatures, including the additional day that has a temperature of 75 degrees is, therefore, 70x + 75. If the average high temperature for x days is 70 degrees, then the sum of those x high temperatures is 70x. (D) The relationship cannot be determined from the information given. The addition of one day with a high temperature of 75 degrees increases the average to 71 degrees. The average (arithmetic mean) high temperature for x days is 70 degrees.
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Note about calculators: On the GRE you'll be given an on-screen calculator with the five basic operations: addition, subtraction, multiplication, division and square root, plus a decimal function and positive/negative feature. COVID-19 Update: To help students through this crisis, The Princeton Review will continue our "Enroll with Confidence" refund policies. To find out more about this curriculum, our Key Stage 2 (KS2) article will keep you informed. Let’s see who’s the smartest cookie in the box.
We’re training the next generation of Mathematical Whizz Kids. We include the key nuggets from the National Curriculum, so we know what to teach you! If you come out of maths classes a little bit confused, or not entirely sure if you were doing it right, we’ll be here to act as a revision tool to go over what you’ve covered. What a great word.) In a single lesson, maths can go from simple to mind-bogglingly complicated. (Do you like that word, pernickety? We love it. Maths in the classroom is a little pernickety.
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We’ll provide helpful explanations after each incorrect answer to let you know where you went wrong and (most importantly) teach you how to get the right answer next time. That’s the magic in maths and we’ve designed our quizzes to try to make that happen as often as possible. You’ll shout ‘Eureka!’, you’ll jump from your chair so high you’ll almost hit the roof and everything in your brain will slot nicely into place. Sometimes you’ll be scratching your head like the ponderer you are, trying to digest all the new information and wondering if you’ll ever be able to figure out percentages or ratios. We won’t lie to you - it’s not all ice cream and sprinkles down there in the quiz section.
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