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

 It is currently 22 Jun 2018, 19:35

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# The ratio of flour to water to sugar in a recipe is 7:4:1.

Author Message
TAGS:

### Hide Tags

Intern
Joined: 11 Oct 2013
Posts: 18
Location: United Kingdom
GMAT 1: 490 Q32 V25
GPA: 3.9
WE: Other (Other)
The ratio of flour to water to sugar in a recipe is 7:4:1. [#permalink]

### Show Tags

21 Jan 2014, 15:10
1
11
00:00

Difficulty:

55% (hard)

Question Stats:

65% (01:31) correct 35% (01:41) wrong based on 369 sessions

### HideShow timer Statistics

The ratio of flour to water to sugar in a recipe is 7:4:1. The ratio in a new recipe calls for a doubling of the ratio of flour to water from the original recipe and a halving of the ratio of flour to sugar. If the new recipe calls for 8 cups of water, how much sugar is required?

(A) 4 cups
(B) 6 cups
(C) 8 cups
(D) 12 cups
(E) 16 cups

_________________

Good things come to those who wait… greater things come to those who get off their ass and do anything to make it happen...

Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 8102
Location: Pune, India
Re: The ratio of flour to water to sugar in a recipe is 7:4:1. [#permalink]

### Show Tags

21 Jan 2014, 21:38
2
4
3111987 wrote:
The ratio of flour to water to sugar in a recipe is 7:4:1. The ratio in a new recipe calls for a doubling of the ratio of flour to water from the original recipe and a halving of the ratio of flour to sugar. If the new recipe calls for 8 cups of water, how much sugar is required?

(A) 4 cups
(B) 6 cups
(C) 8 cups
(D) 12 cups
(E) 16 cups

Flour:Water:Sugar = 7:4:1

Flour:Water = 7:4
New Ratio of Flour:Water = 14:4 = 7:2 (Multiplying the ratio by 2)

Flour:Sugar = 7:1
New Ratio of Flour:Sugar = 7:2 (Halving the ratio)

New Ratio of Flour:Water:Sugar = 7:2:2

For every 2 cups of water, there is 2 cups of sugar. IF you have 8 cups of water, you need 8 cups of sugar.
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for $199 Veritas Prep Reviews Intern Joined: 11 Oct 2013 Posts: 18 Location: United Kingdom Concentration: General Management, Leadership GMAT 1: 490 Q32 V25 GPA: 3.9 WE: Other (Other) Re: The ratio of flour to water to sugar in a recipe is 7:4:1. [#permalink] ### Show Tags 22 Jan 2014, 16:29 VeritasPrepKarishma wrote: 3111987 wrote: The ratio of flour to water to sugar in a recipe is 7:4:1. The ratio in a new recipe calls for a doubling of the ratio of flour to water from the original recipe and a halving of the ratio of flour to sugar. If the new recipe calls for 8 cups of water, how much sugar is required? (A) 4 cups (B) 6 cups (C) 8 cups (D) 12 cups (E) 16 cups Flour:Water:Sugar = 7:4:1 Flour:Water = 7:4 New Ratio of Flour:Water = 14:4 = 7:2 (Multiplying the ratio by 2) Flour:Sugar = 7:1 New Ratio of Flour:Sugar = 7:2 (Halving the ratio) New Ratio of Flour:Water:Sugar = 7:2:2 For every 2 cups of water, there is 2 cups of sugar. IF you have 8 cups of water, you need 8 cups of sugar. dear Karishma big thanks for explanation) questioin: why when you doubling the ratio you multiply both and 7 and 4 but when you halving you apply to one side of ratio 7:2??? _________________ Good things come to those who wait… greater things come to those who get off their ass and do anything to make it happen... Intern Joined: 27 Dec 2013 Posts: 33 Concentration: Finance, General Management Schools: ISB '15 Re: The ratio of flour to water to sugar in a recipe is 7:4:1. [#permalink] ### Show Tags 23 Jan 2014, 00:01 3111987 wrote: The ratio of flour to water to sugar in a recipe is 7:4:1. The ratio in a new recipe calls for a doubling of the ratio of flour to water from the original recipe and a halving of the ratio of flour to sugar. If the new recipe calls for 8 cups of water, how much sugar is required? (A) 4 cups (B) 6 cups (C) 8 cups (D) 12 cups (E) 16 cups Hello, Flour/Water = 7/4, Flour/Sugar = 7/1 Double the ratio of Flour/Water = 7/4 * 2 = 7/2 Halve the ratio of Flour to Sugar = 7 * 1/2 = 7/2 The new ratio of Flour: Water: Sugar = 7:2:2 For 8 cups of water in the new recipe, sugar required will be 8 cups. Answer is C Hope this helps _________________ Kindly consider for kudos if my post was helpful! Veritas Prep GMAT Instructor Joined: 16 Oct 2010 Posts: 8102 Location: Pune, India Re: The ratio of flour to water to sugar in a recipe is 7:4:1. [#permalink] ### Show Tags 23 Jan 2014, 03:06 3111987 wrote: VeritasPrepKarishma wrote: 3111987 wrote: The ratio of flour to water to sugar in a recipe is 7:4:1. The ratio in a new recipe calls for a doubling of the ratio of flour to water from the original recipe and a halving of the ratio of flour to sugar. If the new recipe calls for 8 cups of water, how much sugar is required? (A) 4 cups (B) 6 cups (C) 8 cups (D) 12 cups (E) 16 cups Flour:Water:Sugar = 7:4:1 Flour:Water = 7:4 New Ratio of Flour:Water = 14:4 = 7:2 (Multiplying the ratio by 2) Flour:Sugar = 7:1 New Ratio of Flour:Sugar = 7:2 (Halving the ratio) New Ratio of Flour:Water:Sugar = 7:2:2 For every 2 cups of water, there is 2 cups of sugar. IF you have 8 cups of water, you need 8 cups of sugar. dear Karishma big thanks for explanation) questioin: why when you doubling the ratio you multiply both and 7 and 4 but when you halving you apply to one side of ratio 7:2??? I am not sure I follow you. Original Ratio of Flour:Water $$= 7:4 = \frac{7}{4}$$ New Ratio of Flour:Water (original will be doubled) $$= \frac{7}{4}*2 = \frac{14}{4}$$ Thereafter, I brought 14/4 to lowest terms 7/2. Original Ratio of Flour:Sugar $$= 7:1 = \frac{7}{1}$$ New Ratio of Flour:Sugar (original will be halved) $$= \frac{7}{1*2} = \frac{7}{2}$$ _________________ Karishma Veritas Prep | GMAT Instructor My Blog Get started with Veritas Prep GMAT On Demand for$199

Veritas Prep Reviews

Manager
Joined: 20 Jun 2017
Posts: 77
Location: India
GMAT 1: 720 Q50 V38
GPA: 4
Re: The ratio of flour to water to sugar in a recipe is 7:4:1. [#permalink]

### Show Tags

25 Jun 2017, 08:24

Flour: Water:Sugar = 7:4:1

F:W is doubled so it becomes 14:4
And F:S is halved so it becomes 7:2 or 14:4

Thus new ratio is F:W:S = 14:4:4 or 7:2:2

That is, the ratio of water and sugar is same. So if there are 8 cups of water there should be 8 cups of sugar!
Intern
Joined: 10 Dec 2015
Posts: 31
GMAT 1: 680 Q45 V38
The ratio of flour to water to sugar in a recipe is 7:4:1. [#permalink]

### Show Tags

16 Jan 2018, 13:43
Initial:
Flour(F):Water(W):Sugar(S)=7:4:1
Now, let's separate the ratios for convenience.
F:W=7:4 ; F:S=7:1
Now, bring both ratios to the same denominator by multiplying,
F:W=7:4 ; F:S=28:4
Now, quantity of F in F:W is doubled,
F:W=14:4
Now, quantity of F in F:S is halved,
F:S=14:4

Since the denominators are equal, we can write the new ratio together as,
F:W:S=14:4:4

We see that water and sugar are both in equal quantities in the ratio. Hence, if we add 8 cups of water, we have to add 8 cups of sugar too.
ANS. C
_________________

-Please PM me any doubts which you might have, and I will do my level best to help.

The ratio of flour to water to sugar in a recipe is 7:4:1.   [#permalink] 16 Jan 2018, 13:43
Display posts from previous: Sort by