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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 ## In a sequence of numbers in which each term is 2 more than tagged by: AbeNeedsAnswers ##### This topic has 2 expert replies and 0 member replies ## In a sequence of numbers in which each term is 2 more than ## Timer 00:00 ## Your Answer A B C D E ## Global Stats Difficult In a sequence of numbers in which each term is 2 more than the preceding term, what is the fourth term? (1) The last term is 90. (2) The first term is 2. B Source: Official Guide 2020 ### GMAT/MBA Expert GMAT Instructor Joined 08 Dec 2008 Posted: 12982 messages Followed by: 1249 members Upvotes: 5254 GMAT Score: 770 AbeNeedsAnswers wrote: In a sequence of numbers in which each term is 2 more than the preceding term, what is the fourth term? (1) The last term is 90. (2) The first term is 2. Given: Sequence of numbers is such that each term is 2 more than the preceding term Target question: What is the value of term_4? Statement 1: The last term is 90. We have no idea how many terms there are in the sequence. So, the last term could be term_5 or term_9 or term_12 or . . . Consider these two possible cases: Case a: The last term is term_6. In this case, term_6 = 90. term_5 = 88, term_4 = 86, term_3 = 84....etc. So, the answer to the target question is term_4 = 86 Case b: The last term is term_5. In this case, term_5 = 90. term_4 = 88, term_3 = 86 ....etc. So, the answer to the target question is term_4 = 88 Since we cannot answer the target question with certainty, statement 1 is NOT SUFFICIENT Statement 2: The first term is 2. If term_1 = 2, then: term_2 = 4, term_3 = 6, term_4 = 8, . .. etc The answer to the target question is term_4 = 8 Since we can answer the target question with certainty, statement 2 is SUFFICIENT Answer: B Cheers, Brent _________________ Brent Hanneson â€“ Creator of GMATPrepNow.com Use my video course along with Sign up for free Question of the Day emails And check out all of these free resources GMAT Prep Now's comprehensive video course can be used in conjunction with Beat The GMATâ€™s FREE 60-Day Study Guide and reach your target score in 2 months! ### GMAT/MBA Expert Elite Legendary Member Joined 23 Jun 2013 Posted: 10197 messages Followed by: 496 members Upvotes: 2867 GMAT Score: 800 Hi All, We're told that in a sequence of numbers, each term is 2 more than the preceding term. We're asked for the fourth term. Sequence questions often come down to two pieces of information: the "formula" for how the sequence progresses and one (or more) of the terms (so that you can calculate the other terms in the sequence). The prompt tells us the formula (add 2 as you go from term to term), so we just need one of the terms in the sequence to find the value of the 4th term. (1) The last term is 90. With the information in Fact 1, we can 'work backwards' to find the preceding terms (88...86...84...82, etc.), but we don't know which one will be the 4th term. Fact 1 is INSUFFICIENT (2) The first term is 2. With the information in Fact 2, we can 'work forwards' from the 1st term to find the 4th term: 2nd term = 2+2 = 4 3rd term = 4+2 = 6 4th term = 6+2 = 8 Fact 2 is SUFFICIENT Final Answer: B GMAT assassins aren't born, they're made, Rich _________________ Contact Rich at Rich.C@empowergmat.com • Free Veritas GMAT Class Experience Lesson 1 Live Free Available with Beat the GMAT members only code • Get 300+ Practice Questions 25 Video lessons and 6 Webinars for FREE Available with Beat the GMAT members only code • Award-winning private GMAT tutoring Register now and save up to$200

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