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

It is currently 21 Sep 2018, 18:39

Close

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

100 grams Rosewater is 99% water by weight. After some of the water ev

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

Hide Tags

Senior Manager
Senior Manager
User avatar
G
Joined: 08 Jun 2013
Posts: 332
Location: India
Schools: INSEAD Jan '19
GMAT 1: 200 Q1 V1
GPA: 3.82
WE: Engineering (Other)
GMAT ToolKit User Premium Member
100 grams Rosewater is 99% water by weight. After some of the water ev  [#permalink]

Show Tags

New post 16 Jul 2018, 09:32
1
2
00:00
A
B
C
D
E

Difficulty:

  75% (hard)

Question Stats:

52% (01:50) correct 48% (01:48) wrong based on 73 sessions

HideShow timer Statistics

100 grams Rosewater is 99% water by weight. After some of the water evaporates, the rosewater is now 98% water by weight. What is the new weight of the rosewater, in grams?

A) 2
B) 50
C) 92
D) 96
E) 98

_________________

It seems Kudos button not working correctly with all my posts...

Please check if it is working with this post......

is it?....

Anyways...Thanks for trying :cool:

Math Expert
User avatar
V
Joined: 02 Aug 2009
Posts: 6797
Re: 100 grams Rosewater is 99% water by weight. After some of the water ev  [#permalink]

Show Tags

New post 16 Jul 2018, 10:13
Harshgmat wrote:
100 grams Rosewater is 99% water by weight. After some of the water evaporates, the rosewater is now 98% water by weight. What is the new weight of the rosewater, in grams?

A) 2
B) 50
C) 92
D) 96
E) 98



100gms rosewater..
99% water means 99gm water and remaining 1gm is other part/rose
Now when water evaporates and 99% water becomes 98%, the other part becomes 2% but the weight remains 1gm..
So 2% of rosewater now =1gm
Or 100%=100*1/2=50gm

B
_________________

1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


GMAT online Tutor

Senior Manager
Senior Manager
User avatar
P
Joined: 14 Dec 2017
Posts: 476
Re: 100 grams Rosewater is 99% water by weight. After some of the water ev  [#permalink]

Show Tags

New post 16 Jul 2018, 10:32
Harshgmat wrote:
100 grams Rosewater is 99% water by weight. After some of the water evaporates, the rosewater is now 98% water by weight. What is the new weight of the rosewater, in grams?

A) 2
B) 50
C) 92
D) 96
E) 98



100 gms contains 99 gms water & 1 gms of rose essence

After evaporation of water let X be the weight of rose water

The rose essence is now 2%, hence, we have 1 = (2/100)* X

Solving we get, X = 50 gms


Answer B.



Thanks,
GyM
_________________

New to GMAT Club - https://gmatclub.com/forum/new-to-gmat-club-need-help-271131.html#p2098335

VP
VP
avatar
P
Joined: 07 Dec 2014
Posts: 1087
100 grams Rosewater is 99% water by weight. After some of the water ev  [#permalink]

Show Tags

New post 16 Jul 2018, 13:26
Harshgmat wrote:
100 grams Rosewater is 99% water by weight. After some of the water evaporates, the rosewater is now 98% water by weight. What is the new weight of the rosewater, in grams?

A) 2
B) 50
C) 92
D) 96
E) 98


let x=weight of water lost to evaporation
.99(100)-x=.98(100-x)
x=1/.02=50 grams
100-50=50 grams=new weight of rosewater
B
Target Test Prep Representative
User avatar
G
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 3515
Location: United States (CA)
Re: 100 grams Rosewater is 99% water by weight. After some of the water ev  [#permalink]

Show Tags

New post 19 Jul 2018, 12:33
1
Harshgmat wrote:
100 grams Rosewater is 99% water by weight. After some of the water evaporates, the rosewater is now 98% water by weight. What is the new weight of the rosewater, in grams?

A) 2
B) 50
C) 92
D) 96
E) 98



Initially, we have 99 grams of water and 1 gram of rose. Let w = the amount of water that evaporates, and we can create the equation:

(99 - w)/(100 - w) = 98/100

100(99 - w) = 98(100 - w)

9900 - 100w = 9800 - 98w

100 = 2w

50 = w

We see that 50 grams of water evaporated, so the new weight of the rosewater is 100 - 50 = 50 grams.

Answer: B
_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Re: 100 grams Rosewater is 99% water by weight. After some of the water ev &nbs [#permalink] 19 Jul 2018, 12:33
Display posts from previous: Sort by

100 grams Rosewater is 99% water by weight. After some of the water ev

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

Events & Promotions

PREV
NEXT


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

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®.