GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 20 Apr 2019, 20:02

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# The table above shows the amount of waste material, in tons

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Manager
Joined: 30 Apr 2009
Posts: 99
The table above shows the amount of waste material, in tons  [#permalink]

### Show Tags

01 Nov 2009, 13:13
1
7
00:00

Difficulty:

55% (hard)

Question Stats:

68% (02:06) correct 32% (02:17) wrong based on 514 sessions

### HideShow timer Statistics

Country ---Amount Recycled---------Amount Disposed of
A------------16,700-------------------- 142,800

B-------------8,800----------------------48,000

C------------13,000----------------------51,400

D-------------3,900----------------------20,300

E-------------3,300----------------------16,200

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

Attachments

GMATPrep 2.doc [77.5 KiB]
Downloaded 329 times

 To download please login or register as a user

_________________
Trying to make CR and RC my strong points

"If you want my advice, Peter," he said at last, "you've made a mistake already. By asking me. By asking anyone. Never ask people. Not about your work. Don't you know what you want? How can you stand it, not to know?" Ayn Rand
##### Most Helpful Community Reply
Manager
Status: mba here i come!
Joined: 07 Aug 2011
Posts: 202
ratio  [#permalink]

### Show Tags

01 Apr 2012, 10:00
4
1
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.
_________________
press +1 Kudos to appreciate posts
##### General Discussion
Math Expert
Joined: 02 Sep 2009
Posts: 54376
Re: GMAT Prep 2  [#permalink]

### Show Tags

01 Nov 2009, 14:22
3
1
Country ---Amount Recycled---------Amount Disposed of
A------------16,700-------------------- 142,800

B-------------8,800----------------------48,000

C------------13,000----------------------51,400

D-------------3,900----------------------20,300

E-------------3,300----------------------16,200

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.
_________________
Math Expert
Joined: 02 Sep 2009
Posts: 54376
Re: The table above shows the amount of waste material, in tons  [#permalink]

### Show Tags

24 Jun 2013, 04:04
Bumping for review and further discussion*. Get a kudos point for an alternative solution!

*New project from GMAT Club!!! Check HERE

All DS Fractions/Ratios/Decimals questions: search.php?search_id=tag&tag_id=36
All PS Fractions/Ratios/Decimals questions: search.php?search_id=tag&tag_id=57

_________________
Intern
Joined: 03 Jul 2013
Posts: 1
Location: Sweden
Concentration: Finance, Leadership
GPA: 3.62
WE: Consulting (Consumer Products)
Re: The table above shows the amount of waste material, in tons  [#permalink]

### Show Tags

03 Sep 2013, 06:13
1
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.
Intern
Joined: 14 Jul 2014
Posts: 5
Re: The table above shows the amount of waste material, in tons  [#permalink]

### Show Tags

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
Math Expert
Joined: 02 Sep 2009
Posts: 54376
Re: The table above shows the amount of waste material, in tons  [#permalink]

### Show Tags

21 Jul 2014, 11:46
bigzoo wrote:
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

Lowest ratio is lowest number.
_________________
Intern
Joined: 28 Jul 2016
Posts: 8
Location: India
Concentration: Technology, International Business
WE: Project Management (Computer Hardware)
The table above shows the amount of waste material, in tons  [#permalink]

### Show Tags

01 May 2017, 20:25
Bunuel wrote:
Country ---Amount Recycled---------Amount Disposed of
A------------16,700-------------------- 142,800

B-------------8,800----------------------48,000

C------------13,000----------------------51,400

D-------------3,900----------------------20,300

E-------------3,300----------------------16,200

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!
Director
Joined: 02 Sep 2016
Posts: 663
Re: The table above shows the amount of waste material, in tons  [#permalink]

### Show Tags

19 Aug 2017, 22:19
Bunuel wrote:
Country ---Amount Recycled---------Amount Disposed of
A------------16,700-------------------- 142,800

B-------------8,800----------------------48,000

C------------13,000----------------------51,400

D-------------3,900----------------------20,300

E-------------3,300----------------------16,200

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?
Math Expert
Joined: 02 Sep 2009
Posts: 54376
Re: The table above shows the amount of waste material, in tons  [#permalink]

### Show Tags

20 Aug 2017, 02:22
Shiv2016 wrote:
Bunuel wrote:
Country ---Amount Recycled---------Amount Disposed of
A------------16,700-------------------- 142,800

B-------------8,800----------------------48,000

C------------13,000----------------------51,400

D-------------3,900----------------------20,300

E-------------3,300----------------------16,200

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 Math
The Power of Estimation for GMAT Quant
How to Plug in Numbers on GMAT Math Questions
Number Sense for the GMAT
Can You Use a Calculator on the GMAT?
Why Approximate?
GMAT Math Strategies — Estimation, Rounding and other Shortcuts
The 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 GMAT
How to Avoid Tedious Calculations on the Quantitative Section of the GMAT
GMAT Tip of the Week: No Calculator? No Problem.
The Importance of Sorting Answer Choices on the GMAT

All this is from QUANTITATIVE BOOKS AND STRATEGIES.

Hope it helps.
_________________
Intern
Joined: 05 Jan 2019
Posts: 22
Location: Spain
GMAT 1: 740 Q49 V42
The table above shows the amount of waste material, in tons  [#permalink]

### Show Tags

24 Mar 2019, 06:03
Notice that you can turn all the denominators approximately into 16.000

______ Denominator_____Multiplier______New Numerator
A) ->_____16,700____________~x1____________142,800
B) ->_____8,800_____________~x2___________<96,000
C) ->_____13,000____________~x$$\frac{5}{4}$$____________62,500 -> The lowest
D) ->_____3,900_____________~x4____________80,000
E) ->_____3,300_____________~x5____________>80,000
The table above shows the amount of waste material, in tons   [#permalink] 24 Mar 2019, 06:03
Display posts from previous: Sort by

# The table above shows the amount of waste material, in tons

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.