December 11, 2018 December 11, 2018 09:00 PM EST 10:00 PM EST Strategies and techniques for approaching featured GMAT topics. December 11 at 9 PM EST. December 13, 2018 December 13, 2018 08:00 AM PST 09:00 AM PST What people who reach the high 700's do differently? We're going to share insights, tips and strategies from data we collected on over 50,000 students who used examPAL.
Author 
Message 
TAGS:

Hide Tags

Director
Joined: 25 Apr 2012
Posts: 684
Location: India
GPA: 3.21
WE: Business Development (Other)

"Randy's" bar serves customers every weeknight from 5 pm to
[#permalink]
Show Tags
Updated on: 30 Jan 2014, 01:24
Question Stats:
68% (02:22) correct 32% (02:17) wrong based on 222 sessions
HideShow timer Statistics
"Randy's" bar serves customers every weeknight from 5 pm to 1 am. In Randy's bar, "Silvermoon" beer is sold at a constant rate except during happy hour, from 6:30 to 7:30 pm, when the rate triples. If a keg of Silvermoon beer is half empty at 5pm on Monday, and twothirds empty at the beginning of the happy hour, when will it be completely empty? A. Monday, 7:30 pm B. Monday, 9 pm C. Monday, 7 pm D. Monday, 6:45 pm E. Monday, 9:30 pm
Official Answer and Stats are available only to registered users. Register/ Login.
_________________
“If you can't fly then run, if you can't run then walk, if you can't walk then crawl, but whatever you do you have to keep moving forward.”
Originally posted by WoundedTiger on 30 Jan 2014, 01:05.
Last edited by Bunuel on 30 Jan 2014, 01:24, edited 1 time in total.
Renamed the topic and edited the question.



VP
Joined: 02 Jul 2012
Posts: 1178
Location: India
Concentration: Strategy
GPA: 3.8
WE: Engineering (Energy and Utilities)

Re: "Randy's" bar
[#permalink]
Show Tags
30 Jan 2014, 01:25
Let the keg be a 150 Litre keg At 5 pm.. There are 75 litres At 6:30 pm there are 50 litres. So, consumption rate is 25 litres per 1.5 hours. So it will take 3 hours to finish 50 litres at this rate. During happy hour it sells 3 times faster. So, rate = 1 hour per 50 litres. So, keg becomes empty at 6:30 + 1 hour = 7:30 pm Answer is A.
_________________
Did you find this post helpful?... Please let me know through the Kudos button.
Thanks To The Almighty  My GMAT Debrief
GMAT Reading Comprehension: 7 Most Common Passage Types



Director
Joined: 25 Apr 2012
Posts: 684
Location: India
GPA: 3.21
WE: Business Development (Other)

Re: "Randy's" bar
[#permalink]
Show Tags
30 Jan 2014, 01:38
MacFauz wrote: Let the keg be a 150 Litre keg At 5 pm.. There are 75 litres At 6:30 pm there are 50 litres.
So, consumption rate is 25 litres per 1.5 hours.
So it will take 3 hours to finish 50 litres at this rate.
During happy hour it sells 3 times faster. So, rate = 1 hour per 50 litres.
So, keg becomes empty at 6:30 + 1 hour = 7:30 pm
Answer is A. Macfauz, Thanks for the solution. I acutally spent close to 3 minutes on this Q during the exam. I just wanted to understand about how you picked numbers. Did you start with 150 lts itself or revised later. I do consider numbers based on LCM prinicple but some how goof up in pressure situation. Any pointers ....
_________________
“If you can't fly then run, if you can't run then walk, if you can't walk then crawl, but whatever you do you have to keep moving forward.”



Math Expert
Joined: 02 Sep 2009
Posts: 51098

Re: "Randy's" bar
[#permalink]
Show Tags
30 Jan 2014, 01:46
WoundedTiger wrote: MacFauz wrote: "Randy's" bar serves customers every weeknight from 5 pm to 1 am. In Randy's bar, "Silvermoon" beer is sold at a constant rate except during happy hour, from 6:30 to 7:30 pm, when the rate triples.
If a keg of Silvermoon beer is half empty at 5pm on Monday, and twothirds empty at the beginning of the happy hour, when will it be completely empty?
A. Monday, 7:30 pm B. Monday, 9 pm C. Monday, 7 pm D. Monday, 6:45 pm E. Monday, 9:30 pm
Let the keg be a 150 Litre keg At 5 pm.. There are 75 litres At 6:30 pm there are 50 litres.
So, consumption rate is 25 litres per 1.5 hours.
So it will take 3 hours to finish 50 litres at this rate.
During happy hour it sells 3 times faster. So, rate = 1 hour per 50 litres.
So, keg becomes empty at 6:30 + 1 hour = 7:30 pm
Answer is A. Macfauz, Thanks for the solution. I acutally spent close to 3 minutes on this Q during the exam. I just wanted to understand about how you picked numbers. Did you start with 150 lts itself or revised later. I do consider numbers based on LCM prinicple but some how goof up in pressure situation. Any pointers .... I'd choose a number which is a multiple of both 2 and 3: we have 1/2 and 2/3 mentioned in the stem. Say the capacity is 6 liters: At 5 pm. 3 liters are left. At 6:30 pm 2 liters are left. Regular consumption 1 liter in 1.5 hours. Tripled consumption 3 liters in 1.5 hours, or 3/1.5=2 liters per hour. At 6:30 pm, when the happy hour starts, 2 liters are left, hence at the rate of 2 liters per hour 1 "happy" hour is needed to empty the keg. Answer: E. Hope it helps.
_________________
New to the Math Forum? Please read this: Ultimate GMAT Quantitative Megathread  All You Need for Quant  PLEASE READ AND FOLLOW: 12 Rules for Posting!!! Resources: GMAT Math Book  Triangles  Polygons  Coordinate Geometry  Factorials  Circles  Number Theory  Remainders; 8. Overlapping Sets  PDF of Math Book; 10. Remainders  GMAT Prep Software Analysis  SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS)  Tricky questions from previous years.
Collection of Questions: PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.
What are GMAT Club Tests? Extrahard Quant Tests with Brilliant Analytics



VP
Joined: 02 Jul 2012
Posts: 1178
Location: India
Concentration: Strategy
GPA: 3.8
WE: Engineering (Energy and Utilities)

Re: "Randy's" bar serves customers every weeknight from 5 pm to
[#permalink]
Show Tags
30 Jan 2014, 02:05
As usual.. Nothing more needs to be said after a Bunuel reply..
_________________
Did you find this post helpful?... Please let me know through the Kudos button.
Thanks To The Almighty  My GMAT Debrief
GMAT Reading Comprehension: 7 Most Common Passage Types



Board of Directors
Joined: 17 Jul 2014
Posts: 2621
Location: United States (IL)
Concentration: Finance, Economics
GPA: 3.92
WE: General Management (Transportation)

Re: "Randy's" bar serves customers every weeknight from 5 pm to
[#permalink]
Show Tags
29 Nov 2015, 10:40
if 1/2 was at 5pm and 1/3 at 6:30, that means that in 90 minutes, the clients consumed 1/6 of the beer. now, since 1/6 is consumed in 1.5 hours, let's find how much is consumed in 1 hour: 1/6 * 2/3 = 1/9 is consumed in 1 hour. since the sales triple during the happy hour, the sales of the beer would be 1/9 * 3 or 3/9 or 1/3.
Now, we know that at 6:30 there is left only 1/3 of the beer. between 6:30 and 7:30 is consumed 1/3 of the total beer. It must be true that at 7:30 there will be no beer left.
the same is true if we pick numbers: suppose there are 120 liters of beer in total 60 was at 5pm, and 40 was at 6:30 pm ok, so 20 liters were consumed during 1.5 hours. multiply 20 by 2/3 to see how much during 1 hour is consumed > 40/3. during the happy hour, the sales/consumption triples to 40/3*3 or 40 liters. since we were left with 40 liters at 6:30, and since 40 liters is consumed during the happy hour, 0 liters would be left at 7:30.
A.



Current Student
Status: Fighting Again to bell the CAT
Joined: 28 Aug 2016
Posts: 34
Location: India
GMAT 1: 640 Q49 V30 GMAT 2: 710 Q50 V35
GPA: 3.61

"Randy's" bar serves customers every weeknight from 5 pm to 1 am.
[#permalink]
Show Tags
05 Dec 2016, 02:40
"Randy's" bar serves customers every weeknight from 5 pm to 1 am. In Randy's bar, "Silvermoon" beer is sold at a constant rate except during happy hour, from 6:30 to 7:30 pm, when the rate triples.
If a keg of Silvermoon beer is half empty at 5pm on Monday, and twothirds empty at the beginning of the happy hour, when will it be completely empty?
1) 7:30 pm 2) 7:00 pm 3) 6:45 pm 4) 9:00 pm 5) 9:30 pm



Math Expert
Joined: 02 Sep 2009
Posts: 51098

Re: "Randy's" bar serves customers every weeknight from 5 pm to
[#permalink]
Show Tags
05 Dec 2016, 04:41



Current Student
Status: Fighting Again to bell the CAT
Joined: 28 Aug 2016
Posts: 34
Location: India
GMAT 1: 640 Q49 V30 GMAT 2: 710 Q50 V35
GPA: 3.61

Re: "Randy's" bar serves customers every weeknight from 5 pm to
[#permalink]
Show Tags
06 Dec 2016, 00:53
Bunuel wrote: amandeep_k wrote: "Randy's" bar serves customers every weeknight from 5 pm to 1 am. In Randy's bar, "Silvermoon" beer is sold at a constant rate except during happy hour, from 6:30 to 7:30 pm, when the rate triples.
If a keg of Silvermoon beer is half empty at 5pm on Monday, and twothirds empty at the beginning of the happy hour, when will it be completely empty?
1) 7:30 pm 2) 7:00 pm 3) 6:45 pm 4) 9:00 pm 5) 9:30 pm Merging topics. Please refer to the discussion above. Thanks Bunuel. Just one query, is there a way to check if the same question is posted earlier? TIA



Senior Manager
Joined: 21 Aug 2016
Posts: 265
Location: India
GPA: 3.9
WE: Information Technology (Computer Software)

Re: "Randy's" bar serves customers every weeknight from 5 pm to
[#permalink]
Show Tags
06 Dec 2016, 02:47
Bunuel wrote: WoundedTiger wrote: MacFauz wrote: "Randy's" bar serves customers every weeknight from 5 pm to 1 am. In Randy's bar, "Silvermoon" beer is sold at a constant rate except during happy hour, from 6:30 to 7:30 pm, when the rate triples.
If a keg of Silvermoon beer is half empty at 5pm on Monday, and twothirds empty at the beginning of the happy hour, when will it be completely empty?
A. Monday, 7:30 pm B. Monday, 9 pm C. Monday, 7 pm D. Monday, 6:45 pm E. Monday, 9:30 pm
Let the keg be a 150 Litre keg At 5 pm.. There are 75 litres At 6:30 pm there are 50 litres.
So, consumption rate is 25 litres per 1.5 hours.
So it will take 3 hours to finish 50 litres at this rate.
During happy hour it sells 3 times faster. So, rate = 1 hour per 50 litres.
So, keg becomes empty at 6:30 + 1 hour = 7:30 pm
Answer is A. Macfauz, Thanks for the solution. I acutally spent close to 3 minutes on this Q during the exam. I just wanted to understand about how you picked numbers. Did you start with 150 lts itself or revised later. I do consider numbers based on LCM prinicple but some how goof up in pressure situation. Any pointers .... I'd choose a number which is a multiple of both 2 and 3: we have 1/2 and 2/3 mentioned in the stem. Say the capacity is 6 liters: At 5 pm. 3 liters are left. At 6:30 pm 2 liters are left. Regular consumption 1 liter in 1.5 hours. Tripled consumption 3 liters in 1.5 hours, or 3/1.5=2 liters per hour. At 6:30 pm, when the happy hour starts, 2 liters are left, hence at the rate of 2 liters per hour 1 "happy" hour is needed to empty the keg. Answer: E. Hope it helps. Your post also says that 1 happy hour is sufficient to empty the keg, but you wrote Answer E. Is it by mistake? Thanks for your posts. They are really helpful.  +1 Kudos if you like the post



Senior Manager
Joined: 21 Aug 2016
Posts: 265
Location: India
GPA: 3.9
WE: Information Technology (Computer Software)

Re: "Randy's" bar serves customers every weeknight from 5 pm to
[#permalink]
Show Tags
06 Dec 2016, 02:57
amandeep_k wrote: Bunuel wrote: amandeep_k wrote: "Randy's" bar serves customers every weeknight from 5 pm to 1 am. In Randy's bar, "Silvermoon" beer is sold at a constant rate except during happy hour, from 6:30 to 7:30 pm, when the rate triples.
If a keg of Silvermoon beer is half empty at 5pm on Monday, and twothirds empty at the beginning of the happy hour, when will it be completely empty?
1) 7:30 pm 2) 7:00 pm 3) 6:45 pm 4) 9:00 pm 5) 9:30 pm Merging topics. Please refer to the discussion above. Thanks Bunuel. Just one query, is there a way to check if the same question is posted earlier? TIA When you type the first sentence of the question along with the keyword "on gmatclub" on google, it shows the link of that question if the question is already posted. For above question, if we type on google  Randy's bar serves customers every weeknight from 5 pm to 1 am on gmatclub, it will show the first link of this ques on gmatclub. Hope it helps.  +1 Kudos if you like the post



NonHuman User
Joined: 09 Sep 2013
Posts: 9114

Re: "Randy's" bar serves customers every weeknight from 5 pm to
[#permalink]
Show Tags
24 Sep 2018, 08:59
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.
_________________
GMAT Books  GMAT Club Tests  Best Prices on GMAT Courses  GMAT Mobile App  Math Resources  Verbal Resources




Re: "Randy's" bar serves customers every weeknight from 5 pm to &nbs
[#permalink]
24 Sep 2018, 08:59






