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100 points for $49 worth of Veritas practice GMATs FREE VERITAS PRACTICE GMAT EXAMS Earn 10 Points Per Post Earn 10 Points Per Thanks Earn 10 Points Per Upvote What is the sum of the integers from 1 to 999, inclusive? A This topic has 3 expert replies and 0 member replies Top Member What is the sum of the integers from 1 to 999, inclusive? A Timer 00:00 Your Answer A B C D E Global Stats Difficult What is the sum of the integers from 1 to 999, inclusive? A. 499000 B. 499500 C. 499999 D. 500500 E. 500999 OA B Source: Veritas Prep GMAT/MBA Expert GMAT Instructor Joined 25 May 2010 Posted: 15203 messages Followed by: 1861 members Upvotes: 13060 GMAT Score: 790 BTGmoderatorDC wrote: What is the sum of the integers from 1 to 999, inclusive? A. 499000 B. 499500 C. 499999 D. 500500 E. 500999 For any set of consecutive integers: Count = biggest - smallest + 1. Average = (biggest + smallest)/2. Sum = (count)(average). In the set above: Count = 999 - 1 + 1 = 999. Average = (999 + 1)/2 = 500. Sum = (999)(500) = (1000-1)(500) = 500000-500 = 499500. The correct answer is B. _________________ Mitch Hunt Private Tutor for the GMAT and GRE GMATGuruNY@gmail.com If you find one of my posts helpful, please take a moment to click on the "UPVOTE" icon. Available for tutoring in NYC and long-distance. For more information, please email me at GMATGuruNY@gmail.com. Student Review #1 Student Review #2 Student Review #3 Free GMAT Practice Test How can you improve your test score if you don't know your baseline score? Take a free online practice exam. Get started on achieving your dream score today! Sign up now. GMAT/MBA Expert GMAT Instructor Joined 25 Apr 2015 Posted: 2244 messages Followed by: 17 members Upvotes: 43 BTGmoderatorDC wrote: What is the sum of the integers from 1 to 999, inclusive? A. 499000 B. 499500 C. 499999 D. 500500 E. 500999 OA B Source: Veritas Prep The sum of the integers from 1 to 999, inclusive, is: sum = quantity x average = 999 x (1 + 999)/2 = 999 x 1000/2 = 999 x 500 = 499,500 Answer: B _________________ Scott Woodbury-Stewart Founder and CEO GMAT/MBA Expert Elite Legendary Member Joined 23 Jun 2013 Posted: 10111 messages Followed by: 494 members Upvotes: 2867 GMAT Score: 800 Hi All, We're asked for the sum of the integers from 1 to 999, inclusive. This question can be approached in a number of different ways, including by "bunching" The sum of 1 and 999 is 1,000 The sum of 2 and 998 is 1,000 The sum of 3 and 997 is 1,000 Etc. Using the numbers from 1 to 999, inclusive, we'll have 499 'pairs' of 1000 with one extra number 'leftover', the number "in the middle": 500. Thus, the sum is (499)(1000) + 500 = 499,500 Final Answer: B GMAT assassins aren't born, they're made, Rich _________________ Contact Rich at Rich.C@empowergmat.com • FREE GMAT Exam Know how you'd score today for$0

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