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If d denotes a decimal, is d>=0.5 ? [#permalink]
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15 Oct 2012, 04:49
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Re: If d denotes a decimal, is d>= ? [#permalink]
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15 Oct 2012, 04:49




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Re: If d denotes a decimal, is d>= ? [#permalink]
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15 Oct 2012, 05:24
1) d can be any number between 0.45 to .54  >Insufficient 2) d can be any number greater than or equal to 0.5>Sufficient Answer B
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Re: If d denotes a decimal, is d>=0.5 ? [#permalink]
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16 Oct 2012, 02:38



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Re: If d denotes a decimal, is d>=0.5 ? [#permalink]
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Updated on: 16 Oct 2012, 20:03
so statement 1 (1) When d is rounded to the nearest tenth, the result is 0.5.
so if we pick d=0.48 then in this case the answer to is d>=0.5 is NO
but if we pick d=0.53 then in this case it is YES
2 situations YES / NO ambiguity hence insufficient
When d is rounded to the nearest integer, the result is 1.
so for example if d=0.2 then the decimal would be rounded to nearest integer which is 0
but we have been given that it is rounded to 1 so the range is 0.5 to 1.4 in all of those cases it is rounded to 1 hence B is sufficient
Answer is B
Originally posted by nelz007 on 16 Oct 2012, 06:14.
Last edited by nelz007 on 16 Oct 2012, 20:03, edited 1 time in total.



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Re: If d denotes a decimal, is d>=0.5 ? [#permalink]
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16 Oct 2012, 06:25
Statement 1: round(d,0.1) = 0.5 => 0.45<=d<=0.54 Not suff as d can have values less than 0.5 as well as greater than 0.5 Statement 2: round(d,1) =1 => 0.5 <=d<=1.49 for any value of d here, it is sufficient to answer. Ans B Bunuel wrote: The Official Guide for GMAT® Review, 13th Edition  Quantitative Questions ProjectIf d denotes a decimal, is \(d\geq{0.5}\) ? (1) When d is rounded to the nearest tenth, the result is 0.5. (2) When d is rounded to the nearest integer, the result is 1. Practice Questions Question: 63 Page: 280 Difficulty: 600 GMAT Club is introducing a new project: The Official Guide for GMAT® Review, 13th Edition  Quantitative Questions ProjectEach week we'll be posting several questions from The Official Guide for GMAT® Review, 13th Edition and then after couple of days we'll provide Official Answer (OA) to them along with a solution. We'll be glad if you participate in development of this project: 1. Please provide your solutions to the questions; 2. Please vote for the best solutions by pressing Kudos button; 3. Please vote for the questions themselves by pressing Kudos button; 4. Please share your views on difficulty level of the questions, so that we have most precise evaluation. Thank you!
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Re: If d denotes a decimal, is d>=0.5 ? [#permalink]
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16 Oct 2012, 12:16
Its B.. was confused .49 wud be included in option or not...then i thought no..because .51 to1.49 wud b nearest integer 1..
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Re: If d denotes a decimal, is d>=0.5 ? [#permalink]
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14 May 2016, 07:50
Bunuel wrote: If d denotes a decimal, is \(d\geq{0.5}\) ?
(1) When d is rounded to the nearest tenth, the result is 0.5. (2) When d is rounded to the nearest integer, the result is 1. Solution: We are given that d is a decimal, and we need to determine whether d is greater than or equal to 0.5. Statement One Alone:When d is rounded to the nearest tenth, the result is 0.5. Using the information in statement one, we can get a multitude of values for d. For example, d can be 0.51, and 0.51 is greater than or equal to 0.5.In another case, d can be 0.49, but 0.49 is not greater than or equal to 0.5.Statement one is not sufficient to answer the question. We can eliminate answer choices A and D. Statement Two Alone:When d is rounded to the nearest integer, the result is 1. In order for d to be rounded to 1 (when rounded to the nearest integer), the value of d must be at least 0.5. Statement two is sufficient to answer the question. The answer is B.
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Re: If d denotes a decimal, is d>=0.5 ? [#permalink]
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15 Mar 2018, 07:12
Bunuel wrote: If d denotes a decimal, is d ≥ 0.5?
(1) When d is rounded to the nearest tenth, the result is 0.5. (2) When d is rounded to the nearest integer, the result is 1.
Target question: Is d ≥ 0.5? Statement 1: When d is rounded to the nearest tenth, the result is 0.5. There are several values of d that satisfy statement 1. Here are two: Case a: d = 0.51 (we get 0.5 when 0.51 is rounded to the nearest tenth). In this case, the answer to the target question is YES, it IS the case that d ≥ 0.5Case b: d = 0.49 (we get 0.5 when 0.49 is rounded to the nearest tenth). In this case, the answer to the target question is NO, it is NOT the case that d ≥ 0.5Since we cannot answer the target question with certainty, statement 1 is NOT SUFFICIENT Statement 2: When d is rounded to the nearest integer, the result is 1If we get 1 when d is rounded to the nearest integer, then we know that 0.5 ≤ d < 1.5[/color] So, it MUST be the case that d ≥ 0.5Since we can answer the target question with certainty, statement 2 is SUFFICIENT Answer: B Cheers, Brent
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