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The table above shows the amount of waste material, in tons [#permalink]
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01 Nov 2009, 13:13
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63% (01:25) correct 37% (01:33) wrong based on 634 sessions
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Country Amount RecycledAmount Disposed of A16,700 142,800 B8,80048,000 C13,00051,400 D3,90020,300 E3,30016,200 The table above shows the amount of waste material, in tons, recycled by each of five counties in a single year and the amount of waste material, also in tons, that was disposed of in landfills by the five counties in that year. Which county had the lowest ratio of waste material disposed of to waste material recycled in the year reported in the table? A. A B. B C. C D. D E. E
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Re: GMAT Prep 2 [#permalink]
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01 Nov 2009, 14:22
Country Amount RecycledAmount Disposed of A16,700 142,800
B8,80048,000
C13,00051,400
D3,90020,300
E3,30016,200
The table above shows the amount of waste material, in tons, recycled by each of five counties in a single year and the amount of waste material, also in tons, that was disposed of in landfills by the five counties in that year. Which county had the lowest ratio of waste material disposed of to waste material recycled in the year reported in the table? A. A B. B C. C D. D E. E Question asks to determine lowest ratio of amount disposed / amount recycled. (A) 142,800 / 16,700 = ~ 8  9 (B) 48,000 / 8,800 = ~ 6 (C) 51,400 / 13,000 = ~4 (D) 20,300 / 3,900 = ~ 5 (E) 16,200 / 3,300 = ~ 5 Answer: C. My advice is before doing calculations estimate the numbers and start with the easiest. No need for exact numerical values, so good approximation will work in this case.
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such questions do not ask you to precisely calculate the numbers, thereby asking you to rather estimate. a) \(\frac{143}{17}\) ~some big number b) \(\frac{48}{9}\) ~ 5+ c) \(\frac{51}{3}\) ~4 d) \(\frac{20}{4}\) ~5 e) \(\frac{16}{3}\) ~5 C is the lowest and is the correct ans.
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Re: The table above shows the amount of waste material, in tons [#permalink]
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24 Jun 2013, 04:04



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Re: The table above shows the amount of waste material, in tons [#permalink]
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03 Sep 2013, 06:13
Hello members,
Since the purpose of this question is to practise estimation, I will explain here an interesting way. Start by multiplying denominator by 10 and see if numerator is greater than or less than denominator multiplied by 10. If numerator is less, half the (denominator*10) and see if it less or greater than the new numerator .
[162/33] , here 33x10=330, 330>162, 330/2=165, 165>162 (this means that numerator is around 4 times the denominator)
[203/39], here 39x10=390, 390>203, 390/2=195, 195<203 (this means that numerator is more than 5 times denominator)
[514/130], here 130x10=1300, 1300>514, 1300/2=650, 650 >514 (this means that numerator is less than 5 times and infact a little calculation will show that it is less than 4 times the numerator)
[480/88], here 88x10=880, 880>480, 880/2=440, 440<480 (this means that numerator is more than 5 times the denominator)
[1428/167], here 167x10=1670, 1670>1428, 1670/2=835, 835 < 1428 (this means that numerator is much more than 5 times the denominator)
By finding this strategy, we can see that [514][/130] yields the lowest fraction.



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Re: The table above shows the amount of waste material, in tons [#permalink]
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21 Jul 2014, 11:35
Hi all,
Could someone help me with the phrasing? The question asks for the lowest ratio ... yet the right aswer is the highest ratio. I mean for A: there is 9:1 ... 9 waste to 1 recycled for C: there is 3:1 ... 3 waste to 1 recycled
I would assume that the higher number (9/1=9; 3/1=3) would mean a lower ratio. If you try to make sense of the ratio than the ratio is high e.g. 1:2 or 1:10 etc... the higher the recycled part the higher the ratio is.
Thanks



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Re: The table above shows the amount of waste material, in tons [#permalink]
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21 Jul 2014, 11:46



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The table above shows the amount of waste material, in tons [#permalink]
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01 May 2017, 20:25
Bunuel wrote: Country Amount RecycledAmount Disposed of A16,700 142,800
B8,80048,000
C13,00051,400
D3,90020,300
E3,30016,200
The table above shows the amount of waste material, in tons, recycled by each of five counties in a single year and the amount of waste material, also in tons, that was disposed of in landfills by the five counties in that year. Which county had the lowest ratio of waste material disposed of to waste material recycled in the year reported in the table? A. A B. B C. C D. D E. E
Question asks to determine lowest ratio of amount disposed / amount recycled.
(A) 142,800 / 16,700 = ~ 8  9
(B) 48,000 / 8,800 = ~ 6
(C) 51,400 / 13,000 = ~4
(D) 20,300 / 3,900 = ~ 5
(E) 16,200 / 3,300 = ~ 5
Answer: C.
My advice is before doing calculations estimate the numbers and start with the easiest. No need for exact numerical values, so good approximation will work in this case. Hi, how did you solve? can you explain the easiest way to calculate such big division. thanks!



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Re: The table above shows the amount of waste material, in tons [#permalink]
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19 Aug 2017, 22:19
Bunuel wrote: Country Amount RecycledAmount Disposed of A16,700 142,800
B8,80048,000
C13,00051,400
D3,90020,300
E3,30016,200
The table above shows the amount of waste material, in tons, recycled by each of five counties in a single year and the amount of waste material, also in tons, that was disposed of in landfills by the five counties in that year. Which county had the lowest ratio of waste material disposed of to waste material recycled in the year reported in the table? A. A B. B C. C D. D E. E
Question asks to determine lowest ratio of amount disposed / amount recycled.
(A) 142,800 / 16,700 = ~ 8  9
(B) 48,000 / 8,800 = ~ 6
(C) 51,400 / 13,000 = ~4
(D) 20,300 / 3,900 = ~ 5
(E) 16,200 / 3,300 = ~ 5
Answer: C.
My advice is before doing calculations estimate the numbers and start with the easiest. No need for exact numerical values, so good approximation will work in this case. Bunuel when all can we take approximations? Because I have tried using this method but it gives different answer. How much and when to estimate?



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Re: The table above shows the amount of waste material, in tons [#permalink]
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20 Aug 2017, 02:22
Shiv2016 wrote: Bunuel wrote: Country Amount RecycledAmount Disposed of A16,700 142,800
B8,80048,000
C13,00051,400
D3,90020,300
E3,30016,200
The table above shows the amount of waste material, in tons, recycled by each of five counties in a single year and the amount of waste material, also in tons, that was disposed of in landfills by the five counties in that year. Which county had the lowest ratio of waste material disposed of to waste material recycled in the year reported in the table? A. A B. B C. C D. D E. E
Question asks to determine lowest ratio of amount disposed / amount recycled.
(A) 142,800 / 16,700 = ~ 8  9
(B) 48,000 / 8,800 = ~ 6
(C) 51,400 / 13,000 = ~4
(D) 20,300 / 3,900 = ~ 5
(E) 16,200 / 3,300 = ~ 5
Answer: C.
My advice is before doing calculations estimate the numbers and start with the easiest. No need for exact numerical values, so good approximation will work in this case. Bunuel when all can we take approximations? Because I have tried using this method but it gives different answer. How much and when to estimate? Collected several articles on this issue: How to Do Math on the GMAT Without Actually Doing MathThe Power of Estimation for GMAT QuantHow to Plug in Numbers on GMAT Math QuestionsNumber Sense for the GMATCan You Use a Calculator on the GMAT?Why Approximate?GMAT Math Strategies — Estimation, Rounding and other ShortcutsThe 4 Math Strategies Everyone Must Master, Part 1 (1. Test Cases and 2. Choose Smart Numbers.) The 4 Math Strategies Everyone Must Master, part 2 (3. Work Backwards and 4. Estimate) Intelligent Guessing on GMATHow to Avoid Tedious Calculations on the Quantitative Section of the GMATGMAT Tip of the Week: No Calculator? No Problem.The Importance of Sorting Answer Choices on the GMATAll this is from QUANTITATIVE BOOKS AND STRATEGIES. Hope it helps.
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Collection of Questions: PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.
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Re: The table above shows the amount of waste material, in tons
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