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

 It is currently 21 Jun 2018, 22:08

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# The number of North American children who are obese-that is,

Author Message
TAGS:

### Hide Tags

Intern
Joined: 13 Oct 2015
Posts: 2
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

11 Dec 2015, 14:28
pkm9995109794 wrote:
the answer "c" is not convincing
rate of increase for obese children -10%
Case 1 Total number of children increases

------------Obese-----Non-Obease------Total
Year-1---- 10--------90----------------100
Year-2-----11--------90----------------101
Year-3---- 12--------90----------------102
Year-4---- 13--------90----------------103

Case 2 Total number of children constant
------------Obese-----Non-Obease--------Total
Year-1---- 10-------- 90----------------100
Year-2---- 11-------- 89-----------------100
Year-3---- 12---------88-----------------100
Year-4---- 13--------87----------------- 100

it is not mentioned that total number of children are increasing/decreasing.In both case Number on nonobese children need not increase

If I am not mistaken, you have to keep in mind that the more obese you introduce into the system the value (body fat %) of what constitutes the 85th percentile increases.

If that happens you start seeing the number of people who was once considered obese becoming non-obese.

Just like the GMAT, if a substantial amount of people all of a sudden started scoring 800's, the more likely it is that I wont get into a top school anymore with my old score because my score potentially could no longer be considered high scoring.
Intern
Joined: 15 Jun 2015
Posts: 3
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

27 Feb 2016, 02:51
If no of children who are not obese increases then the percentage of obese children should go down.
How can C be the correct answer?

Regards
Kaustav
Intern
Joined: 08 Feb 2016
Posts: 28
Location: Italy
GMAT 1: 730 Q47 V44
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

28 Feb 2016, 01:45
KAUSTAV89 wrote:
If no of children who are not obese increases then the percentage of obese children should go down.
How can C be the correct answer?

Regards
Kaustav

Number of children who are obese (more fat than 85% of the total children) increased.
It means that the number of the 15% fattest kids increased.
-> the 85% of non-fattest kids increased too, since both are a percentage on the total number of children. If 15% increased, then 85% increased too.
Board of Directors
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 3511
Location: India
GPA: 3.5
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

28 Feb 2016, 02:07
2
1
boksana wrote:
114. The number of North American children who are obese-that is, who have more body fat than do 85 percent of North American children their age is steadily increasing, according to four major studies conducted over the past 15 years.

If the finding reported above is correct, it can be properly concluded that

(A) when four majors studies all produce similar results, those studies must be accurate

Out of scope, we are not at all concerned about the accuracy of the information.

(B) North American children have been progressively less physically active over the past 15 years

We do not know whether physical activity contributes to children not being obese / there are any other factors.

(D) over the past 15 years, the number of North American children who are underweight has declined

Weight has got nothing to do with obesity , check carefully we are considering body fat not weight.

(E) the incidence of obesity in North American children tends to increase as the children grow older

We do not have any information to infer this, out of scope.

(C) the number of North American children who are not obese increased over the past 15 years

Total No of Children = Obese Children + Non Obese Children

If number of Obese children are increasing ( keeping the total number of children same) then the number of non obese children must decrease.

Hence IMHO (C) undoubtedly
_________________

Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )

Senior Manager
Status: Always try to face your worst fear because nothing GOOD comes easy. You must be UNCOMFORTABLE to get to your COMFORT ZONE
Joined: 15 Aug 2014
Posts: 328
Concentration: Marketing, Technology
GMAT 1: 570 Q44 V25
GMAT 2: 600 Q48 V25
WE: Information Technology (Consulting)
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

16 May 2016, 23:08
1
Abhishek009 wrote:
boksana wrote:
114. The number of North American children who are obese-that is, who have more body fat than do 85 percent of North American children their age is steadily increasing, according to four major studies conducted over the past 15 years.

If the finding reported above is correct, it can be properly concluded that

(A) when four majors studies all produce similar results, those studies must be accurate

Out of scope, we are not at all concerned about the accuracy of the information.

(B) North American children have been progressively less physically active over the past 15 years

We do not know whether physical activity contributes to children not being obese / there are any other factors.

(D) over the past 15 years, the number of North American children who are underweight has declined

Weight has got nothing to do with obesity , check carefully we are considering body fat not weight.

(E) the incidence of obesity in North American children tends to increase as the children grow older

We do not have any information to infer this, out of scope.

(C) the number of North American children who are not obese increased over the past 15 years

Total No of Children = Obese Children + Non Obese Children

If number of Obese children are increasing ( keeping the total number of children same) then the number of non obese children must decrease.

Hence IMHO (C) undoubtedly

Hi Abhishek009

How do you know total is same?

also option C says num of non-obese children is increasing but you took it as decreasing..

_________________

"When you want to succeed as bad as you want to breathe, then you’ll be successful.” - Eric Thomas

I need to work on timing badly!!

Intern
Joined: 05 Feb 2016
Posts: 13
The number of North American children who are obese [#permalink]

### Show Tags

Updated on: 25 May 2016, 01:38
1
1
The number of North American children who are obese, that is who have more body fat than do 85 percent of North American children their age, is steadily increasing according to four major studies conducted over the past 15 years.

If the finding reported above is correct, it can be properly concluded that

(A) when four major studies all produce similar results those studies must be accurate.

(B) North American children have been progressively less physically active over the past 15 years.

(C) The number of North American children who are not obese increased over the past 15 years.

(D) Over the past 15 years, the number of North American children who are underweight has declined.

(E) The incidence of obesity in North American children tends to increase as the children grow older.

Originally posted by ishajindal on 24 May 2016, 22:37.
Last edited by Vyshak on 25 May 2016, 01:38, edited 4 times in total.
Formatted the question
SC Moderator
Joined: 13 Apr 2015
Posts: 1689
Location: India
Concentration: Strategy, General Management
GMAT 1: 200 Q1 V1
GPA: 4
WE: Analyst (Retail)
Re: The number of North American children who are obese [#permalink]

### Show Tags

24 May 2016, 22:48
1
Children are obese if their body fat is more than 85 percent of children of their age --> 15% of children are obese and rest 85% are not obese

The number of children who are obese has increased --> since the 15 : 85 ratio does not change any increase in the number of obese children will lead to an increase in the number of children who are not obese.

Manager
Joined: 24 Apr 2014
Posts: 115
Location: India
Concentration: Strategy, Operations
GMAT 1: 730 Q50 V38
GMAT 2: 750 Q48 V45
GPA: 4
WE: Information Technology (Computer Software)
Re: The number of North American children who are obese [#permalink]

### Show Tags

24 May 2016, 23:42
1
Vyshak wrote:
Children are obese if their body fat is more than 85 percent of children of their age --> 15% of children are obese and rest 85% are not obese

The number of children who are obese has increased --> since the 15 : 85 ratio does not change any increase in the number of obese children will lead to an increase in the number of children who are not obese.

Since the question is about numbers and percentages, best approach is to do this in quant way .

Ratio of not obese to obese is 85/15

85% not obese and 15% obese .

Lets say initial number is 100 , thus 85 not obese and 15 obese .

Now as per question lets say number of obese increases to 30 , then in order to maintain the ratio of 85/15 . The numerator (85) must increase to 170 .

Thus, C is the only correct answer we can conclude .

If you like the explaination the please give kudos .[GRINNING FACE WITH SMILING EYES]

Sent from my Le X507 using GMAT Club Forum mobile app
_________________

way to victory .....

Board of Directors
Joined: 01 Sep 2010
Posts: 3421
Re: The number of North American children who are obese [#permalink]

### Show Tags

25 May 2016, 01:24
1
On this board, the rules are created to be followed. And they are mandatory. No exceptions.

This topic lacks the few, nonetheless, essential rules :

- at least 3 tags
- a proper title
- a good formatting

From now ongoing this kind of post will be deleted right away and the kudos rewarded, as well. Moreover, the mods that reply to this kind of post is strongly recommended to take proactive actions in such behaviour.

Regards
_________________
SC Moderator
Joined: 13 Apr 2015
Posts: 1689
Location: India
Concentration: Strategy, General Management
GMAT 1: 200 Q1 V1
GPA: 4
WE: Analyst (Retail)
Re: The number of North American children who are obese [#permalink]

### Show Tags

25 May 2016, 01:32
1
carcass wrote:
On this board, the rules are created to be followed. And they are mandatory. No exceptions.

This topic lacks the few, nonetheless, essential rules :

- at least 3 tags
- a proper title
- a good formatting

From now ongoing this kind of post will be deleted right away and the kudos rewarded, as well. Moreover, the mods that reply to this kind of post is strongly recommended to take proactive actions in such behaviour.

Regards

Hi carcass,

Since I answered it via tapatalk, I was not aware that the question was posted in the wrong forum. I have moved the topic to CR and I have fulfilled the necessary requirements to keep this post in the forum.
Intern
Joined: 19 Jan 2014
Posts: 33
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

27 May 2016, 04:16
actually, when i saw the question i thought total number of children has been increasing. but, in C, how can one say non- obese children are increasing? it can be increase in total number of children increase, without increase in non-obese but just increase in obese. please explain.
Manager
Joined: 03 May 2015
Posts: 236
Location: South Africa
GPA: 3.49
WE: Web Development (Insurance)
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

07 Jun 2016, 23:41
1
Abhishek009 wrote:
boksana wrote:
114. The number of North American children who are obese-that is, who have more body fat than do 85 percent of North American children their age is steadily increasing, according to four major studies conducted over the past 15 years.

If the finding reported above is correct, it can be properly concluded that

(A) when four majors studies all produce similar results, those studies must be accurate

Out of scope, we are not at all concerned about the accuracy of the information.

(B) North American children have been progressively less physically active over the past 15 years

We do not know whether physical activity contributes to children not being obese / there are any other factors.

(D) over the past 15 years, the number of North American children who are underweight has declined

Weight has got nothing to do with obesity , check carefully we are considering body fat not weight.

(E) the incidence of obesity in North American children tends to increase as the children grow older

We do not have any information to infer this, out of scope.

(C) the number of North American children who are not obese increased over the past 15 years

Total No of Children = Obese Children + Non Obese Children

If number of Obese children are increasing ( keeping the total number of children same) then the number of non obese children must decrease.

Hence IMHO (C) undoubtedly

This logic is flawed. You are saying total no. of children is same ( not possible)

From the argument :

Definition of obesity : bf> 85% of NA kids. So 85% people always need to have bodyfat less than whatever is the current obesity level.

85% = no. of non obese/ (no. of obese + no. of non obese)

So if no. of obese is increasing, to keep the 85% constant. no. of non obese has to increase as well. Else there will be a drop in 85%.

Clearly C
_________________

Kudos if I helped

Manager
Joined: 03 May 2015
Posts: 236
Location: South Africa
GPA: 3.49
WE: Web Development (Insurance)
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

07 Jun 2016, 23:45
aimkp wrote:
74. The number of North American children who are obese, that is who have more body fat than do 85 percent of North American children their age, is steadily increasing according to four major studies conducted over the past 15 years.
If the finding reported above is correct, it can be properly concluded that
(A) when four major studies all produce similar results those studies must be accurate.
(B) North American children have been progressively less physically active over the past 15 years.
(C) The number of North American children who are not obese increased over the past 15 years.
(D) Over the past 15 years, the number of North American children who are underweight has declined.
(E) The incidence of obesity.

From the argument :

Definition of obesity : bf> 85% of NA kids. So 85% people always need to have bodyfat less than whatever is the current obesity level.

85% = no. of non obese/ (no. of obese + no. of non obese)

So if no. of obese is increasing, to keep the 85% constant. no. of non obese has to increase as well. Else there will be a drop in 85%.

Clearly C
_________________

Kudos if I helped

Current Student
Joined: 05 Jul 2016
Posts: 48
Location: China
Concentration: Finance, Nonprofit
GMAT 1: 680 Q49 V33
GMAT 2: 690 Q51 V31
GMAT 3: 710 Q50 V36
GPA: 3.4
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

21 Jul 2016, 03:18
I chose the wrong one, but agreed that C is the correct answer after the calculation. Let's see the statistics:

year------------------------# of children------obese-------non-obese--------obese%
one of the 15 years---------1000-------------150---------850--------------- 15%
another year-----------------2000-------------300---------1700------------- 15%

To conform to the 15% data, the numbers of both obese and non-obese children should increase.
_________________

It's better to burn out than to fade away.

Retired Moderator
Joined: 04 Aug 2016
Posts: 573
Location: India
GPA: 4
WE: Engineering (Telecommunications)
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

01 Apr 2017, 04:05
Total Number of Children = Obese + Non-Obese

Relationship: Obese children have fat > than 85 percent of North American children their age.

Comparison is within the same age group and hence E is out.

If obese children are growing , then non-obese will also grow. Lets say out of 100 children - 15 are deemed obese and 85 are non-obese. If the number ought to increase within the same age group, then either some kids should transition from non-obese to obese with total constant or total increases and so does both quantities i.e. obese and non-obese. Since the studies are concluded on the bases of a survey over last 15 years, it is highly unlikely that total will remain constant and hence latter holds true and it can be concluded that both groups are increasing.

C
Director
Joined: 26 Oct 2016
Posts: 666
Location: United States
Schools: HBS '19
GMAT 1: 770 Q51 V44
GPA: 4
WE: Education (Education)
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

22 Apr 2017, 07:08
The number of North American children who have more body fat than 85% of children their age is always 15% of the children that age.

So this number, which is always 15% of children, increased. This can only mean that the 100% of children increased, meaning also the remaining 85% (children who are not obese) increased.

Let population be x 15 years ago
Number of Obese children 15 years ago = .15x (15% of x)
Number of Non Obese Children 15 years ago = .85x(85% of x)

Let population today be y
Number of Obese children today = .15y(15% of y)
Number of Non Obese children today =.85y(85% of y)

Acc to Stimulus ->
Number of Obese children today > Number of Obese children 15 years ago
.15y>.15x
this implies y > x
so .85y > .85x
Number of Non Obese children today > Number of Non Obese Children 15 years ago
so C is valid
_________________

Thanks & Regards,
Anaira Mitch

Director
Joined: 26 Oct 2016
Posts: 666
Location: United States
Schools: HBS '19
GMAT 1: 770 Q51 V44
GPA: 4
WE: Education (Education)
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

22 Apr 2017, 07:12
arirux92 wrote:
Abhishek009 wrote:
boksana wrote:
114. The number of North American children who are obese-that is, who have more body fat than do 85 percent of North American children their age is steadily increasing, according to four major studies conducted over the past 15 years.

If the finding reported above is correct, it can be properly concluded that

(A) when four majors studies all produce similar results, those studies must be accurate

Out of scope, we are not at all concerned about the accuracy of the information.

(B) North American children have been progressively less physically active over the past 15 years

We do not know whether physical activity contributes to children not being obese / there are any other factors.

(D) over the past 15 years, the number of North American children who are underweight has declined

Weight has got nothing to do with obesity , check carefully we are considering body fat not weight.

(E) the incidence of obesity in North American children tends to increase as the children grow older

We do not have any information to infer this, out of scope.

(C) the number of North American children who are not obese increased over the past 15 years

Total No of Children = Obese Children + Non Obese Children

If number of Obese children are increasing ( keeping the total number of children same) then the number of non obese children must decrease.

Hence IMHO (C) undoubtedly

This logic is flawed. You are saying total no. of children is same ( not possible)

From the argument :

Definition of obesity : bf> 85% of NA kids. So 85% people always need to have bodyfat less than whatever is the current obesity level.

85% = no. of non obese/ (no. of obese + no. of non obese)

So if no. of obese is increasing, to keep the 85% constant. no. of non obese has to increase as well. Else there will be a drop in 85%.

Clearly C

Since the number of obese children and the number of non-obese children are both increasing, the total population of children must also be increasing.
_________________

Thanks & Regards,
Anaira Mitch

Intern
Joined: 22 Feb 2017
Posts: 12
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

29 Apr 2017, 08:47
Since it says number of children who are overweight increases
Overweight those who have weight more than 85% , if 85% n now corresponds to a higher number, so shall 15 %.
Intern
Joined: 26 Mar 2017
Posts: 29
GMAT 1: 720 Q50 V38
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

29 Apr 2017, 12:33
boksana wrote:
114. The number of North American children who are obese-that is, who have more body fat than do 85 percent of North American children their age---is steadily increasing, according to four major studies conducted over the past 15 years.

If the finding reported above is correct, it can be properly concluded that

(A) when four majors studies all produce similar results, those studies must be accurate
(B) North American children have been progressively less physically active over the past 15 years
(C) the number of North American children who are not obese increased over the past 15 years
(D) over the past 15 years, the number of North American children who are underweight has declined
(E) the incidence of obesity in North American children tends to increase as the children grow older

A. Incorrect-No such evidence in the argument.
B. Incorrect-No correlation between physical fitness and body fat have been established.
C. Correct- Ratio of Non-obese to obese is 85/15 always. If # of obese increases then so does # of non-obese.
D. Incorrect-No correlation between weight and body fat have been established. One possible case is- less body fat means more muscle and thus more weight.
E. Incorrect- Age of those children has not been mentioned.
Intern
Joined: 08 Jul 2016
Posts: 28
Location: Singapore
GMAT 1: 570 Q43 V25
WE: Underwriter (Insurance)
Re: The number of North American children who are obese-that is, [#permalink]

### Show Tags

15 Feb 2018, 09:30
can we have links to more questions like this one?
Re: The number of North American children who are obese-that is,   [#permalink] 15 Feb 2018, 09:30

Go to page   Previous    1   2   3    Next  [ 41 posts ]

Display posts from previous: Sort by