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# On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps,

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Joined: 14 May 2015
Posts: 4
Concentration: Healthcare
GMAT 1: 720 Q49 V40
On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps,  [#permalink]

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Updated on: 16 Jun 2015, 08:56
1
00:00

Difficulty:

(N/A)

Question Stats:

91% (02:31) correct 9% (01:14) wrong based on 15 sessions

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On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps, and 2 flaaps equal 3 fliips. How many floops are equal to 35 fliips?

Solution (from the MGMT SG book):

35 fliips x 2 flaaps/3 fliips x 4 fleeps/7 flaaps x 3 floops/5 fleeps = 8 floops

I understand their solution but am puzzled as to why my 1st method brings up the completely wrong answer

My approach was such:

Given:

3 Floops = 5 Fleeps Eq. A
4 Fleeps = 7 Flaaps Eq. B
2 Flaaps = 3 Fliips Eq. C

Find:

X Floops = 35 Fliips

Approach:

Eq. C x 7:
14 Flaaps = 35 Fliips

Eq. B x 2:
14 Flaaps = 8 Fleeps

Eq. A x 8/5:
8/5*3 Floops = 8 Fleeps

35 Fliips = 14 Flaaps = 8 Fleeps = 8/5*3 Floops
Thus
35 Fliips = 24/5 Floops?

Originally posted by Dr3xus on 16 Jun 2015, 06:15.
Last edited by Bunuel on 16 Jun 2015, 08:56, edited 1 time in total.
Edited the question.
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Re: On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps,  [#permalink]

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17 Jun 2015, 08:57
3
2
On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps, and 2 flaaps equal 3 fliips. How many floops are equal to 35 fliips?
a = floops
b = fleeps
c = flaaps
d = fliips
x * a = 35 * d where "x" is the unknown number of floops

3a = 5b = > (3a/5) = b
4b = 7c = > 4 (3a/5) = 7c => (12a/35) = c
2c = 3d => 2 (12a/35) = 3d => (24a/35) = 3d cross multiply
(24/3) a = 35 d
8 * a=35 * d

8
##### General Discussion
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Re: On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps,  [#permalink]

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16 Jun 2015, 07:30
1
Dr3xus wrote:
On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps, and 2 flaaps equal 3 fliips. How many floops are equal to 35 fliips?

Solution (from the MGMT SG book):
35 fliips x 2 flaaps/3 fliips x 4 fleeps/7 flaaps x 3 floops/5 fleeps = 8 floops

I understand their solution but am puzzled as to why my 1st method brings up the completely wrong answer

My approach was such:

Given:

3 Floops = 5 Fleeps Eq. A
4 Fleeps = 7 Flaaps Eq. B
2 Flaaps = 3 Fliips Eq. C

Find:

X Floops = 35 Fliips

Approach:

Eq. C x 7:
14 Flaaps = 35 Fliips

Eq. B x 2:
14 Flaaps = 8 Fleeps

Eq. A x 8/5:
8/5*3 Floops = 8 Fleeps

35 Fliips = 14 Flaaps = 8 Fleeps = 8/5*3 Floops
Thus
35 Fliips = 24/5 Floops?

Hi,

Eq. C x 7: Gives you
14 Flaaps = 21 Fliips

Suggestion: In the questions of Conversion, It's best to convert the the higher units into smaller units instead of converting the other way round

Lets Solve as per your method

Eq. C x (35/3): Gives you

70/3 Flaaps = 35 Fliips

Now, Eq. B x (10/3):
70/3 Flaaps = 40/3 Fleeps

Now, Eq. A x (8/3):
8 Floops = 40/3 Fleeps

i.e. 8 Floop should be the CORRECT answer
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Re: On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps,  [#permalink]

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16 Jun 2015, 08:57
Dr3xus wrote:
On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps, and 2 flaaps equal 3 fliips. How many floops are equal to 35 fliips?

Solution (from the MGMT SG book):

35 fliips x 2 flaaps/3 fliips x 4 fleeps/7 flaaps x 3 floops/5 fleeps = 8 floops

I understand their solution but am puzzled as to why my 1st method brings up the completely wrong answer

My approach was such:

Given:

3 Floops = 5 Fleeps Eq. A
4 Fleeps = 7 Flaaps Eq. B
2 Flaaps = 3 Fliips Eq. C

Find:

X Floops = 35 Fliips

Approach:

Eq. C x 7:
14 Flaaps = 35 Fliips

Eq. B x 2:
14 Flaaps = 8 Fleeps

Eq. A x 8/5:
8/5*3 Floops = 8 Fleeps

35 Fliips = 14 Flaaps = 8 Fleeps = 8/5*3 Floops
Thus
35 Fliips = 24/5 Floops?

Similar question to practice: if-1-tic-equals-3-tacs-and-2-tacs-equal-5-tocs-what-is-the-2249.html
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GMAT 1: 720 Q49 V40
Re: On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps,  [#permalink]

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16 Jun 2015, 11:06
Thank you, re-did the sum multiple times from scratch and for some reason I kept making the same calculation error.

Appreciate the tip too, it makes sense
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On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps,  [#permalink]

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16 Jun 2015, 12:05
Dr3xus wrote:
On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps, and 2 flaaps equal 3 fliips. How many floops are equal to 35 fliips?

Solution (from the MGMT SG book):

35 fliips x 2 flaaps/3 fliips x 4 fleeps/7 flaaps x 3 floops/5 fleeps = 8 floops

I understand their solution but am puzzled as to why my 1st method brings up the completely wrong answer

My approach was such:

Given:

3 Floops = 5 Fleeps Eq. A
4 Fleeps = 7 Flaaps Eq. B
2 Flaaps = 3 Fliips Eq. C

Find:

X Floops = 35 Fliips

Approach:

Eq. C x 7:
14 Flaaps = 35 Fliips

Eq. B x 2:
14 Flaaps = 8 Fleeps

Eq. A x 8/5:
8/5*3 Floops = 8 Fleeps

35 Fliips = 14 Flaaps = 8 Fleeps = 8/5*3 Floops
Thus
35 Fliips = 24/5 Floops?

Solve like it was a Ratio Problem and multiply with the ratios:
35*2/3*4/7*3/5 = 8
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Re: On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps,  [#permalink]

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31 Dec 2018, 06:58
I am a novice in GMAT Quant. Can someone please explain keeping in view my situation?

not getting at grasp with this at all :/
Re: On the planet Flarp, 3 floops equal 5 fleeps, 4 fleeps equal 7 flaaps,   [#permalink] 31 Dec 2018, 06:58
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