BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

Obesity

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 208
Joined: Sat Jan 31, 2009 11:32 am
Location: Mumbai
Thanked: 2 times
by vikram_k51 » Sun Aug 23, 2009 4:50 am
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
OA C
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Critical Reasoning |
Legendary Member
Posts: 1161
Joined: Mon May 12, 2008 2:52 amFollowed by: 1 member
Location: Sydney
Thanked: 23 times

by mehravikas » Wed Sep 09, 2009 10:53 pm
I really doubt that the OA is C. What's the source?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Newbie | Next Rank: 10 Posts
Posts: 9
Joined: Mon Jul 27, 2009 2:46 am

by MaxPower » Thu Sep 10, 2009 5:59 am
Why? It kinda makes sense (except for the dodgy definition of obesity, even if it is the right one).

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.

vikram - can you tell us where you got this question?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 869
Joined: Wed Aug 26, 2009 3:49 pmFollowed by: 3 members
Location: California
Thanked: 13 times

by heshamelaziry » Thu Sep 10, 2009 8:16 am
MaxPower wrote:Why? It kinda makes sense (except for the dodgy definition of obesity, even if it is the right one).

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.

vikram - can you tell us where you got this question?
The stimuli does not indicate that the number of obese children is always 15% of all children. It says that this percentage has been increasing the past 15 years !!!!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 159
Joined: Thu Aug 27, 2009 10:30 am
Thanked: 19 times

by bharathh » Thu Sep 10, 2009 8:21 am
It says the number is increasing. Not the %. The % has to be the same for the definition of obesity to stick.

I agree with max
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 1161
Joined: Mon May 12, 2008 2:52 amFollowed by: 1 member
Location: Sydney
Thanked: 23 times

by mehravikas » Thu Sep 10, 2009 11:27 am
yes it says..but how can you say that number of children who are not obese has also increased?
bharathh wrote:It says the number is increasing. Not the %. The % has to be the same for the definition of obesity to stick.

I agree with max
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 833
Joined: Mon Aug 04, 2008 1:56 am
Thanked: 13 times

by vivek.kapoor83 » Fri Sep 11, 2009 10:21 am
im not conviunced with OA..wht is d source of ques....
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 809
Joined: Wed Mar 24, 2010 10:10 pmFollowed by: 4 members
Thanked: 50 times

by akhpad » Wed Jul 21, 2010 9:47 pm
Source: Power Score CR/LR Bible

Actual source: Official LSAT past question

I am unable to understand that how figure 15% and 85% is fixed. What grammar am I missing?

Number of obese children = 15%
Number of non-obese children = 85%
These information is fixed over time. This is the only point that I am missing.

Can someone explain it?

OA: C
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 32
Joined: Sat May 01, 2010 9:03 pmFollowed by: 1 member

by bdiwakarteja » Wed Jul 21, 2010 10:12 pm
akhp77 wrote:Source: Power Score CR/LR Bible

Actual source: Official LSAT past question

I am unable to understand that how figure 15% and 85% is fixed. What grammar am I missing?

Number of obese children = 15%
Number of non-obese children = 85%
These information is fixed over time. This is the only point that I am missing.

Can someone explain it?

OA: C
Let me try to explain you how the percentages have come in. From the definition of the obesity in the passage, it says that a child can be said as obese if he outweighs/overweighs 85% of the all other north american children of his age.
This directs us that the number of children that can be obese and will be obese at anypoint in time is only 15% of the total amount. However, when the stimulus says that this 15% of the children is increasing in number, it means that the total number of children are increasing.This also means for sure that the number of children who are not obese are increasing for the past 15 years.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3380
Joined: Mon Mar 03, 2008 1:20 amFollowed by: 1535 members
Thanked: 2256 times
GMAT Score:800

by lunarpower » Thu Oct 07, 2010 4:32 am
received a PM.

i really can't improve on this:
MaxPower wrote:Why? It kinda makes sense (except for the dodgy definition of obesity, even if it is the right one).

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.

vikram - can you tell us where you got this question?
perfect explanation.

since i'm sure that everybody on this board understands percentiles, think about it this way: the passage is basically defining obesity as being in the 85th or higher percentile of body fat.
given the way percentiles work, the number of children who satisfy this definition will always be exactly 15% of the total number of children. therefore, the only way for this number to increase is for the entire population of children to increase.

i agree that this question is not very typical of what you would see on the gmat. ironically, if you ever saw a question similar to this one on the gmat, you would probably encounter it in the quant section, not in CR.
Ron has been teaching various standardized tests for 20 years.

--

Pueden hacerle preguntas a Ron en castellano
Potete chiedere domande a Ron in italiano
On peut poser des questions à Ron en français
Voit esittää kysymyksiä Ron:lle myös suomeksi

--

Quand on se sent bien dans un vêtement, tout peut arriver. Un bon vêtement, c'est un passeport pour le bonheur.

Yves Saint-Laurent

--

Learn more about ron
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1