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:

A certain cake has two layers with pieces of fruit on top of [#permalink]

Show Tags

01 Dec 2012, 05:03

6

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

35% (medium)

Question Stats:

64% (02:12) correct
36% (01:06) wrong based on 149 sessions

HideShow timer Statistics

A certain cake has two layers with pieces of fruit on top of each layer. Of all the pieces of fruit on the cake, 25 percent are strawberries. How many pieces of fruit are on the first layer of the cake?

(1) Of the pieces of fruit on the first layer, 6 are strawberries. (2) 20 percent of the 20 pieces of fruit on the second layer are strawberries.

Re: DS - A certain cake has two - Gmat Prep Extension Pack [#permalink]

Show Tags

01 Dec 2012, 05:25

3

This post received KUDOS

lazarogb wrote:

A certain cake has two layers with pieces of fruit on top of each layer. Of all the pieces of fruit on the cake, 25 percent are strawberies. How many pieces of fruit are on the first layer of the cake?

1) Of the pieces of fruit on the first layer, 6 are strawberries.

2) 20 percent of the 20 pieces of fruit on the second layer are strawberries.

The explanation from the gmat prep is a bit confusing, can anyone make a more direct user-friendly solution??

1)No data on the composition of the layer. Clearly Insufficient.

2)We get that there are 4 strawberries on the second layer.Clearly insufficient.

1 & 2 together. There are a total of 10 strawberries. This constitutes 25% of the total pieces of fruit. So total pieces of fruit over both layers = 40. Layer two has 20. So layer 1 has 40 - 20 = 20. Sufficient.

Answer is C. _________________

Did you find this post helpful?... Please let me know through the Kudos button.

Re: DS - A certain cake has two - Gmat Prep Extension Pack [#permalink]

Show Tags

01 Dec 2012, 05:48

1

This post received KUDOS

th03 wrote:

lazarogb wrote:

A certain cake has two layers with pieces of fruit on top of each layer. Of all the pieces of fruit on the cake, 25 percent are strawberies. How many pieces of fruit are on the first layer of the cake?

1) Of the pieces of fruit on the first layer, 6 are strawberries.

2) 20 percent of the 20 pieces of fruit on the second layer are strawberries.

The explanation from the gmat prep is a bit confusing, can anyone make a more direct user-friendly solution??

Consider 1) It is given that 6 are strawberries. We have no idea about the number of other pieces of fruit on the first layer. Thus, eliminate choices A and D.

Consider 2) No information is given about the number of pieces of fruit in the first layer. Thus, eliminate B.

Consider both 1) and 2) First layer=6 strawberries Second layer=20% of 20 pieces of fruit are strawberries => 4 strawberry pieces => (6 + 4) strawberries totals to 25% as given in the question. Using this, we can find out the number of pieces of the other fruit. => If 25%=10 pieces, 75%=30 pieces

Hence, we can find the solution. The answer is C.

You actually do not need to calculate so much and find the exact number. The moment we arrive at 25%=10 strawberry pieces, we should choose C and move on.

Hope this helps!

Just my two cents...

If the second statement had been something like

Of the pieces of fruit on the second layer, 4 are strawberries. We still would have got 25% = 10. But the statement would still have been insufficient and answer would have been E. _________________

Did you find this post helpful?... Please let me know through the Kudos button.

Re: DS - A certain cake has two - Gmat Prep Extension Pack [#permalink]

Show Tags

01 Dec 2012, 05:29

lazarogb wrote:

A certain cake has two layers with pieces of fruit on top of each layer. Of all the pieces of fruit on the cake, 25 percent are strawberies. How many pieces of fruit are on the first layer of the cake?

1) Of the pieces of fruit on the first layer, 6 are strawberries.

2) 20 percent of the 20 pieces of fruit on the second layer are strawberries.

The explanation from the gmat prep is a bit confusing, can anyone make a more direct user-friendly solution??

Ok we have 2 layers in a cake and on top of each layer we have fruits. Among these fruits 25% is strawberies. Let x be all the fruits in both the layers. Question stems tells 25% of X = strawberies What is X? To find what x is we need to know nos of strawberies in both the layers. ie. 25% of x = strawberies in layer 1 + strawberies in layer 2

Statement 1 says 25% of x = 6 + strawberies in layer 2; we still dont know strawberies in layer 2 so we cant find x. Statement 2 says 25% of x = strawberies in layer 1 + 4 ; we still dont know strawberies in layer 1 so we cant find x.

Combined we have strawberies in both the layers so we CAN find x.

Re: DS - A certain cake has two - Gmat Prep Extension Pack [#permalink]

Show Tags

01 Dec 2012, 05:37

lazarogb wrote:

A certain cake has two layers with pieces of fruit on top of each layer. Of all the pieces of fruit on the cake, 25 percent are strawberies. How many pieces of fruit are on the first layer of the cake?

1) Of the pieces of fruit on the first layer, 6 are strawberries.

2) 20 percent of the 20 pieces of fruit on the second layer are strawberries.

The explanation from the gmat prep is a bit confusing, can anyone make a more direct user-friendly solution??

Consider 1) It is given that 6 are strawberries. We have no idea about the number of other pieces of fruit on the first layer. Thus, eliminate choices A and D.

Consider 2) No information is given about the number of pieces of fruit in the first layer. Thus, eliminate B.

Consider both 1) and 2) First layer=6 strawberries Second layer=20% of 20 pieces of fruit are strawberries => 4 strawberry pieces => (6 + 4) strawberries totals to 25% as given in the question. Using this, we can find out the number of pieces of the other fruit. => If 25%=10 pieces, 75%=30 pieces

Hence, we can find the solution. The answer is C.

You actually do not need to calculate so much and find the exact number. The moment we arrive at 25%=10 strawberry pieces, we should choose C and move on.

Re: A certain cake has two layers with pieces of fruit on top of [#permalink]

Show Tags

01 Dec 2012, 07:08

Expert's post

A certain cake has two layers with pieces of fruit on top of each layer. Of all the pieces of fruit on the cake, 25 percent are strawberries. How many pieces of fruit are on the first layer of the cake?

Say there are x pieces of fruit on the cake, thus we are given that there are 0.25x pieces of strawberries.

(1) Of the pieces of fruit on the first layer, 6 are strawberries. No info about the second layer. Not sufficient.

(2) 20 percent of the 20 pieces of fruit on the second layer are strawberries --> there are 0.2*20=4 pieces of strawberries on the second layer. No info about the first layer. Not sufficient.

(1)+(2) From above we have that there are total of 6+4=10 pieces of strawberries, thus there are total of 40 pieces of fruit on the cake (from 0.25x=10). Since from (2) we have that there are 20 pieces of fruit on the second layer, then there are 40-20=20 pieces of fruit on the first layer. Sufficient.

Re: A certain cake has two layers with pieces of fruit on top of [#permalink]

Show Tags

29 Jan 2014, 17:45

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: A certain cake has two layers with pieces of fruit on top of [#permalink]

Show Tags

02 Aug 2015, 08:06

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. _________________

Part 2 of the GMAT: How I tackled the GMAT and improved a disappointing score Apologies for the month gap. I went on vacation and had to finish up a...

I’m a little delirious because I’m a little sleep deprived. But whatever. I have to write this post because... I’M IN! Funnily enough, I actually missed the acceptance phone...

So the last couple of weeks have seen a flurry of discussion in our MBA class Whatsapp group around Brexit, the referendum and currency exchange. Most of us believed...

This highly influential bestseller was first published over 25 years ago. I had wanted to read this book for a long time and I finally got around to it...