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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

During a certain week, a seal ate 50% of the first 80 smelt [#permalink]

Show Tags

24 May 2013, 15:44

5

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

45% (medium)

Question Stats:

65% (01:46) correct
35% (01:58) wrong based on 265 sessions

HideShow timer Statistics

During a certain week, a seal ate 50% of the first 80 smelt it came across, and 30% of the remaining smelt it came across. If the seal ate 40% of the smelt it came across during the entire week, how many smelt did it eat?

During a certain week, a seal ate 50% of the first 80 smelt it came across, and 30% of the remaining smelt it came across. If the seal ate 40% of the smelt it came across during the entire week, how many smelt did it eat?

Re: During a certain week, a seal ate 50% of the first 80 smelt [#permalink]

Show Tags

25 May 2013, 03:34

Bunuel wrote:

pikachu wrote:

During a certain week, a seal ate 50% of the first 80 smelt it came across, and 30% of the remaining smelt it came across. If the seal ate 40% of the smelt it came across during the entire week, how many smelt did it eat?

During a certain week, a seal ate 50% of the first 80 smelt it came across, and 30% of the remaining smelt it came across. If the seal ate 40% of the smelt it came across during the entire week, how many smelt did it eat?

Re: During a certain week, a seal ate 50% of the first 80 smelt [#permalink]

Show Tags

23 May 2014, 02:45

Hi,

I am getting a different answer. My approach: 1. First Part - 80 smelts - 50% eaten = 40 ....... Statement 1 2. 2nd Part - x smelts - 30% eaten = 0.3x ....... Statement 2

Total Smelts = 1st part + 2nd part = 80+x Seal ate 40% of total smelts => 0.4 (80+x) ....... Statement 3

Therefore , combining Statement 1,2,3 40 + 0.3x = 0.4(80+x) . This is giving x = 80 and 32 as the answer.

During a certain week, a seal ate 50% of the first 80 smelt it came across, and 30% of the remaining smelt it came across. If the seal ate 40% of the smelt it came across during the entire week, how many smelt did it eat?

A. 32 B. 40 B. 55 D. 64 E. 80

Hi,

I am getting a different answer. My approach: 1. First Part - 80 smelts - 50% eaten = 40 ....... Statement 1 2. 2nd Part - x smelts - 30% eaten = 0.3x ....... Statement 2

Total Smelts = 1st part + 2nd part = 80+x Seal ate 40% of total smelts => 0.4 (80+x) ....... Statement 3

Therefore , combining Statement 1,2,3 40 + 0.3x = 0.4(80+x) . This is giving x = 80 and 32 as the answer.

Kindly assist where I have gone wrong. Thanks

We are told that the seal ate 30% of the remaining smelt it came across. Thus x in your solution must be the number of the remaining smelt. Which makes the total number of smelt equal to 80 + x = 160. 40% of 160 is 64.

During a certain week, a seal ate 50% of the first 80 smelt it came across, and 30% of the remaining smelt it came across. If the seal ate 40% of the smelt it came across during the entire week, how many smelt did it eat?

A. 32 B. 40 B. 55 D. 64 E. 80

Responding to a pm:

The seal ate 50% of first portion and 30% of second portion. Overall (average), it ate 40% of the entire portion.

Using scale method, Second portion/First portion = (50 - 40)/(40 - 30) = 1/1

So both portions need to be equal i.e. of 80 smelts each. So both portions together had 160 smelts and the seal ate 40% of it i.e. (40/100)*160 = 64 smelts
_________________

Re: During a certain week, a seal ate 50% of the first 80 smelt [#permalink]

Show Tags

19 Sep 2015, 14:24

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

Re: During a certain week, a seal ate 50% of the first 80 smelt [#permalink]

Show Tags

22 May 2016, 00:09

pikachu wrote:

During a certain week, a seal ate 50% of the first 80 smelt it came across, and 30% of the remaining smelt it came across. If the seal ate 40% of the smelt it came across during the entire week, how many smelt did it eat?

A. 32 B. 40 B. 55 D. 64 E. 80

Let total no of smelts be X. eaten smalts:- 50% of first 80==40 && 30 % of remaining (X-80)==30(X-80)/100 total 40% of X 40+ 30(X-80)/100=40X/100 X=160. so eaten smelts= 40*160/100==64 Ans D.

Re: During a certain week, a seal ate 50% of the first 80 smelt [#permalink]

Show Tags

22 May 2016, 11:15

pikachu wrote:

During a certain week, a seal ate 50% of the first 80 smelt it came across, and 30% of the remaining smelt it came across. If the seal ate 40% of the smelt it came across during the entire week, how many smelt did it eat?

A. 32 B. 40 B. 55 D. 64 E. 80

First the seal ate 50% of 80 i.e 40 smelt.

Suppose the number of remaining smelts is x. Seal then ate .30x of these remaining smelts.

Total smelts are 80+ x and seal ate 40% of 80+x

.4(80+x)= 40+.3x x= 80

Total smelts eaten are .4(80+80)= 64

D is the answer
_________________

I welcome critical analysis of my post!! That will help me reach 700+

Re: During a certain week, a seal ate 50% of the first 80 smelt [#permalink]

Show Tags

25 Apr 2017, 02:05

mayankgc wrote:

Hi,

I am getting a different answer. My approach: 1. First Part - 80 smelts - 50% eaten = 40 ....... Statement 1 2. 2nd Part - x smelts - 30% eaten = 0.3x ....... Statement 2

Total Smelts = 1st part + 2nd part = 80+x Seal ate 40% of total smelts => 0.4 (80+x) ....... Statement 3

Therefore , combining Statement 1,2,3 40 + 0.3x = 0.4(80+x) . This is giving x = 80 and 32 as the answer.

Kindly assist where I have gone wrong. Thanks

Hi,

I did the same thing and I think what you have to do is assume the remaining smelts as x. Thus, x will be 80 and 30% of the remaining smelts will be 24 which will give total as 64. Hope its clear.
_________________

Consider giving me Kudos if you find my posts useful, challenging and helpful!

Re: During a certain week, a seal ate 50% of the first 80 smelt [#permalink]

Show Tags

21 Jun 2017, 07:47

pikachu wrote:

During a certain week, a seal ate 50% of the first 80 smelt it came across, and 30% of the remaining smelt it came across. If the seal ate 40% of the smelt it came across during the entire week, how many smelt did it eat?

Version 8.1 of the WordPress for Android app is now available, with some great enhancements to publishing: background media uploading. Adding images to a post or page? Now...

Post today is short and sweet for my MBA batchmates! We survived Foundations term, and tomorrow's the start of our Term 1! I'm sharing my pre-MBA notes...

“Keep your head down, and work hard. Don’t attract any attention. You should be grateful to be here.” Why do we keep quiet? Being an immigrant is a constant...