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

 It is currently 24 Jun 2018, 18:55

### 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

### Show Tags

16 Feb 2016, 23:08
2
Sunil01 wrote:
Hi Karishma and Bunuel,

In order to prove the third statement 1.e y>3, you are assuming x=0.
Is this allowed to assume x=0.

Thanks & regards,
Sunil01

So we need to figure out whether y must be greater than 3. So I think to myself - what is so great about y = 3 that it cannot happen while y = 4 can probably happen?
That is why I put y = 3 and see the numbers I get.

If y = 3, total earning = 20 + 3*6 = 38
I know that this week he earned more than twice of last week. So if he sold 3 bikes this week, he must have earned less than $19 last week. But last week he MUST have earned at least$20, right? That is his fixed salary. This is the reason y cannot be 3 or less. It MSUT be more than 3.
We don't assume that x is 0. We say that even if x = 0, his last week's salary cannot be $19. This means he sold at least 4 bikes this week. _________________ Karishma Veritas Prep | GMAT Instructor My Blog Get started with Veritas Prep GMAT On Demand for$199

Veritas Prep Reviews

Math Expert
Joined: 02 Aug 2009
Posts: 5938
Re: As a bicycle salesperson, Norman earns a fixed salary of $20 [#permalink] ### Show Tags 17 Feb 2016, 02:54 2 Sunil01 wrote: VeritasPrepKarishma wrote: Sunil01 wrote: Hi Karishma and Bunuel, In order to prove the third statement 1.e y>3, you are assuming x=0. Is this allowed to assume x=0. Thanks & regards, Sunil01 So we need to figure out whether y must be greater than 3. So I think to myself - what is so great about y = 3 that it cannot happen while y = 4 can probably happen? That is why I put y = 3 and see the numbers I get. If y = 3, total earning = 20 + 3*6 = 38 I know that this week he earned more than twice of last week. So if he sold 3 bikes this week, he must have earned less than$19 last week. But last week he MUST have earned at least $20, right? That is his fixed salary. This is the reason y cannot be 3 or less. It MSUT be more than 3. We don't assume that x is 0. We say that even if x = 0, his last week's salary cannot be$19. This means he sold at least 4 bikes this week.

Nicely explained thanks Karishma

Hi,
although the explanation is almost same as a post above this explanation, but since you did not understand my English, I got to start looking into my Verbal ..
Kidding... Till the time you are learning, its ok, and I am sure none is contributing for appreciation.
_________________

Absolute modulus :http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html

GMAT online Tutor

Intern
Joined: 15 Jun 2016
Posts: 47
Location: India
Concentration: Technology, Strategy
GMAT 1: 730 Q50 V39

### Show Tags

11 Jul 2016, 22:59
2
target760gmat wrote:
I got this as the last qn (7#) or one before last .. Is it better to mark last 3-4 qns randomly when the time left is around 3 minutes or attend a qn or two properly in those three minutes and and leave the last 1/2 qn ? Experts pls advise.

If you are left with just a few mins with 3-4 questions in hand, try to give a quick shot to each. Read the question stem and you might be able to narrow down the choices based on some simple logic. Take a guess out of those and move on. It increases the probability of a correct answer. Don't leave 1-2 questions unanswered at the end. Try to take a smart guess.
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for $199 Veritas Prep Reviews Intern Joined: 07 Sep 2016 Posts: 37 Re: As a bicycle salesperson, Norman earns a fixed salary of$20 [#permalink]

### Show Tags

01 Jul 2017, 08:28
mbaiseasy wrote:
Test the inequalities:
I. $$y>2x$$
Let x = 1 bicycle; Earnings: 26 dollars
Let y = 3 bicylce; Earnings: 38 dollars
Is 38 more than twice of 26? NO!
II. $$y > x$$
Surely, there must be more bicycles sold in the second week. Always true! YES!
III. y>3
Testing I, we found that when y = 3 and x = 1, we still couldn't achieve the condition that the second week's earning is more than twice the first. Therefore, y must be greater than 3. YES!

So it means we are sure that no sales no salary?
Manager
Joined: 15 Dec 2016
Posts: 92

### Show Tags

15 Feb 2018, 13:00
Hi All,

This Roman Numeral question can be solved with "brute force"; let's map out the possibilities and look for patterns. Based on the given information, here's a table of how much money Norman would make (based on the number of bikes sold):

Bikes = Money
0 = 20

1 = 26
2 = 32
3 = 38
4 = 44
5 = 50
6 = 56

7 = 68
8 = 80
9 = 92
10 = 104
11 = 116
12 = 128

13 = 144
14 = 162
Etc. ($18 per additional bike) We're told that Norman sold X bicycles last week and Y bicycles this week. We also know that he earned MORE THAN TWICE the money he earned in the prior week, so we have to use THAT fact to evaluate what the possibilities could be (within the table). II. Y > X Roman Numeral II is easiest, so we'll start there. Since Norman earned MORE MONEY, he had to have sold MORE bicycles. Thus Y MUST be greater than X. Roman Numeral II is TRUE. III. Y > 3 Here, we can look at the "top" of the table and talk through the possibilities. If last week, Norman sold ___ bikes, then how many would he need to have sold this week, at the MINIMUM, to make MORE than twice the money? 0 bikes….4 or more bikes were sold 1 bike…..6 or more bikes were sold The second number will just get bigger and bigger. This proves that Y MUST be greater than 3. Roman Numeral III is TRUE. I. Y > 2X For this Roman Numeral, we can continue the work that we did in Roman Numeral II; we have to look to see whether Y is ALWAYS greater than 2X or not… 2 bikes….7 or more bikes were sold 3 bikes….8 or more bikes were sold 4 bikes….9 or more bikes were sold At this point, notice the ratio of Y to X is getting smaller….? 5 bikes…10 or more bikes were sold. This last example PROVES that Y isn't always greater than 2X. Roman Numeral I is NOT ALWAYS TRUE. Final Answer: GMAT assassins aren't born, they're made, Rich _________________ 760+: Learn What GMAT Assassins Do to Score at the Highest Levels Contact Rich at: Rich.C@empowergmat.com # Rich Cohen Co-Founder & GMAT Assassin Special Offer: Save$75 + GMAT Club Tests Free
Official GMAT Exam Packs + 70 Pt. Improvement Guarantee
www.empowergmat.com/

***********************Select EMPOWERgmat Courses now include ALL 6 Official GMAC CATs!***********************