NEW HERE? LEARN MORE
closeclose
Last visit was: 03 May 2024, 15:38 It is currently 03 May 2024, 15:38
Decision Tracker
My Rewards
New posts
New comers' posts

Close
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
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

Re: GRE: Quant question

   1   2   3   
User avatar
L
chetan2u
RC & DI Moderator
Joined: 02 Aug 2009
Status:Math and DI Expert
Posts: 11216
Own Kudos [?]: 32208 [0]
Given Kudos: 299
Send PM
Reviews Badge
Re: Re: GRE: Quant question [#permalink] New post   22 Apr 2024, 04:08
Expert Reply
Substitute y=0 when you put x as -5 and 4, and substitute x=0 when y=-60 where the parabola cuts y axis. x=-5 and y as 0 will give B and E as the answer. X=0 and y=-60 will eliminate B answer E
User avatar
B
Alex55
Manager
Manager
Joined: 09 Jan 2024
Posts: 67
Own Kudos [?]: 17 [0]
Given Kudos: 23
Location: Bangladesh
GMAT 1: 760 Q56 V59
Send PM
Re: Re: GRE: Quant question [#permalink] New post   22 Apr 2024, 04:11
can you give me the parabola equation way h,k method
User avatar
L
carcass
Board of Directors
Joined: 01 Sep 2010
Posts: 4398
Own Kudos [?]: 32944 [0]
Given Kudos: 4461
Send PM
Re: Re: GRE: Quant question [#permalink] New post   22 Apr 2024, 04:12
Alex55 wrote:
@chetan2u what if b2-4ac>0 or b2-4ac<0 then

please refer to our theory here about quadratic formula and all the rest of it gre-math-essentials-a-most-comprehensive-handout-427648-20.html#p3383726

please also see the entire GRE handout we created to learn avery single cocept tested on the GRE
User avatar
B
Alex55
Manager
Manager
Joined: 09 Jan 2024
Posts: 67
Own Kudos [?]: 17 [0]
Given Kudos: 23
Location: Bangladesh
GMAT 1: 760 Q56 V59
Send PM
Re: Re: GRE: Quant question [#permalink] New post   22 Apr 2024, 04:13
carcass wrote:
please also see the entire GRE handout we created to learn avery single cocept tested on the GRE

link plz
User avatar
L
carcass
Board of Directors
Joined: 01 Sep 2010
Posts: 4398
Own Kudos [?]: 32944 [0]
Given Kudos: 4461
Send PM
Re: Re: GRE: Quant question [#permalink] New post   22 Apr 2024, 04:13
gre-math-essentials-a-most-comprehensive-handout-427648.html#p3373307

the first link is to this particular geometery concept tested

t5he second is to the general handout

you do not need else for the math GRe side
User avatar
B
Alex55
Manager
Manager
Joined: 09 Jan 2024
Posts: 67
Own Kudos [?]: 17 [0]
Given Kudos: 23
Location: Bangladesh
GMAT 1: 760 Q56 V59
Send PM
Re: Re: GRE: Quant question [#permalink] New post   22 Apr 2024, 04:49
c is the ans

sorry D
User avatar
L
chetan2u
RC & DI Moderator
Joined: 02 Aug 2009
Status:Math and DI Expert
Posts: 11216
Own Kudos [?]: 32208 [0]
Given Kudos: 299
Send PM
Reviews Badge
Re: Re: GRE: Quant question [#permalink] New post   22 Apr 2024, 05:39
Expert Reply
Put x=0, then f(0)=0 and g(0)=0+1=1. Thus, y=0+1=1. Check where does the curve cut y axis at 1. Only A and D left. Next put x=1, so f(1) =1 and g(1)=b+1. Thus y = 1+b+1=2+b. At x=1, y=~1.5 in A, while in D, y=3. Hence, D
User avatar
B
Alex55
Manager
Manager
Joined: 09 Jan 2024
Posts: 67
Own Kudos [?]: 17 [0]
Given Kudos: 23
Location: Bangladesh
GMAT 1: 760 Q56 V59
Send PM
Re: Re: GRE: Quant question [#permalink] New post   22 Apr 2024, 06:25
Is the math right?
User avatar
B
Alex55
Manager
Manager
Joined: 09 Jan 2024
Posts: 67
Own Kudos [?]: 17 [0]
Given Kudos: 23
Location: Bangladesh
GMAT 1: 760 Q56 V59
Send PM
Re: Re: GRE: Quant question [#permalink] New post   22 Apr 2024, 06:53
chetan2u wrote:
Put x=0, then f(0)=0 and g(0)=0+1=1. Thus, y=0+1=1. Check where does the curve cut y axis at 1. Only A and D left. Next put x=1, so f(1) =1 and g(1)=b+1. Thus y = 1+b+1=2+b. At x=1, y=~1.5 in A, while in D, y=3. Hence, D

I didnot get the y=1.5 and y=3🙂🙂
User avatar
L
carcass
Board of Directors
Joined: 01 Sep 2010
Posts: 4398
Own Kudos [?]: 32944 [0]
Given Kudos: 4461
Send PM
Re: GRE: Quant question [#permalink] New post   22 Apr 2024, 16:06
Top Contributor
­A ribbon 40-inches long is to be cut into three pieces, each of whose lengths is a different integer number of inches.

Quantity A

The least possible length, in inches, of the longest piece

Quantity B

15

A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.­

Show Spoiler
C
­
User avatar
L
chetan2u
RC & DI Moderator
Joined: 02 Aug 2009
Status:Math and DI Expert
Posts: 11216
Own Kudos [?]: 32208 [0]
Given Kudos: 299
Send PM
Reviews Badge
Re: Re: GRE: Quant question [#permalink] New post   22 Apr 2024, 18:55
Expert Reply
Alex55 wrote:
I didnot get the y=1.5 and y=3🙂🙂

Check the graph. Draw a perpendicular from x=1. Rather the grids are alrady made. Check where does the vertical line from x=1 intersect the parabola as that will give you value of y. Where x= 1, y=1.5 as per the curve in A, but y=3 in D
User avatar
B
Alex55
Manager
Manager
Joined: 09 Jan 2024
Posts: 67
Own Kudos [?]: 17 [0]
Given Kudos: 23
Location: Bangladesh
GMAT 1: 760 Q56 V59
Send PM
Re: Re: GRE: Quant question [#permalink] New post   22 Apr 2024, 23:40
On a radio call-in show, the 6th caller and every 6th caller thereafter were given a T-shirt. Also, the 15th caller and every 15th caller thereafter were given movie tickets. A total of 78 people called the show, all at different times. How many of the callers were given neither a T-shirt nor movie tickets?
_________ callers
User avatar
B
Alex55
Manager
Manager
Joined: 09 Jan 2024
Posts: 67
Own Kudos [?]: 17 [0]
Given Kudos: 23
Location: Bangladesh
GMAT 1: 760 Q56 V59
Send PM
Re: Re: GRE: Quant question [#permalink] New post   23 Apr 2024, 00:13
Last week, each employee at a small company, except for one employee, made a donation to a certain charity. The average (arithmetic mean) amount of the donations was $39 per person. This week, after the remaining employee made a donation, the average amount of the donations increased to $40 per person. If the remaining employee’ s donation was between $54 and $61, which of the following could be the total number of employees at the company?

Indicate all such numbers.
User avatar
L
carcass
Board of Directors
Joined: 01 Sep 2010
Posts: 4398
Own Kudos [?]: 32944 [0]
Given Kudos: 4461
Send PM
Re: GRE: Quant question [#permalink] New post   23 Apr 2024, 00:21
Top Contributor
­
Quote:
On a radio call-in show, the 6th caller and every 6th caller thereafter were given a T-shirt. Also, the 15th caller and every 15th caller thereafter were given movie tickets. A total of 78 people called the show, all at different times. How many of the callers were given neither a T-shirt nor movie tickets?
_________ callers­

­Jot down the shirts

6-12-18-24-36-42-48-60-66-72-78

The tickets

15-30-45-60-75

13+5=18

78-18=60 But because essentially the is a number property question where we do have a range of numbers we should add one.

61

The answer should be 61 but PLEASE: always report the official answer otherwise is difficult for us. I believe chetan2u would agree on that­
User avatar
B
Alex55
Manager
Manager
Joined: 09 Jan 2024
Posts: 67
Own Kudos [?]: 17 [0]
Given Kudos: 23
Location: Bangladesh
GMAT 1: 760 Q56 V59
Send PM
Re: Re: GRE: Quant question [#permalink] New post   23 Apr 2024, 00:22
ans isn 62. 30 and 60 are common in both will they be included
User avatar
L
chetan2u
RC & DI Moderator
Joined: 02 Aug 2009
Status:Math and DI Expert
Posts: 11216
Own Kudos [?]: 32208 [1]
Given Kudos: 299
Send PM
Reviews Badge
Re: Re: GRE: Quant question [#permalink] New post   23 Apr 2024, 05:04
1
Kudos
Expert Reply
Alex55 wrote:
On a radio call-in show, the 6th caller and every 6th caller thereafter were given a T-shirt. Also, the 15th caller and every 15th caller thereafter were given movie tickets. A total of 78 people called the show, all at different times. How many of the callers were given neither a T-shirt nor movie tickets? _________ callers

Multiples of 6: 78/6 or 13; Multiples of 15: 75/15 or 5; Common to both 30 and 60. So people who get gift 13+5-2 or 16...Who do not get gift = 78-16 = 62

Alex55 wrote:
Last week, each employee at a small company, except for one employee, made a donation to a certain charity. The average (arithmetic mean) amount of the donations was $39 per person. This week, after the remaining employee made a donation, the average amount of the donations increased to $40 per person. If the remaining employee’ s donation was between $54 and $61, which of the following could be the total number of employees at the company? Indicate all such numbers.

Total after extra employee donates 54 = 39x+54 = 40(x+1), where x is initial number who donated...x=14..Total =14+1 = 15..........Next if extra employee donated 61, then 39x+61=40(x+1)..x=21 or Total = 22.....Number of employees can be 15,16,17,18,19,20,21,22

carcass, sure enough OA should be there. It tells us taht the question has some source, and if OA is wrong, we can tell the member that the source can be discarded.
User avatar
L
carcass
Board of Directors
Joined: 01 Sep 2010
Posts: 4398
Own Kudos [?]: 32944 [0]
Given Kudos: 4461
Send PM
Re: GRE: Quant question [#permalink] New post   23 Apr 2024, 06:23
Top Contributor
­I found the question online, and the OA was 61, but according to your explanation (on which I agree totally), it is 62.

When the source is not reliable and the students take a question here and there on google the thing is going to be messy somehow chetan2u

Anyway.........not a big deal
User avatar
B
Alex55
Manager
Manager
Joined: 09 Jan 2024
Posts: 67
Own Kudos [?]: 17 [0]
Given Kudos: 23
Location: Bangladesh
GMAT 1: 760 Q56 V59
Send PM
Re: Re: GRE: Quant question [#permalink] New post   24 Apr 2024, 04:53
Six identical marbles are to be distributed among 4 cups numbered 1 through 4 so that in the resulting distribution there will be at least one marble in each cup. How many different distributions are possible?
6
8
9
10
12
User avatar
L
chetan2u
RC & DI Moderator
Joined: 02 Aug 2009
Status:Math and DI Expert
Posts: 11216
Own Kudos [?]: 32208 [0]
Given Kudos: 299
Send PM
Reviews Badge
Re: Re: GRE: Quant question [#permalink] New post   24 Apr 2024, 05:46
Expert Reply
Alex55 wrote:
Six identical marbles are to be distributed among 4 cups numbered 1 through 4 so that in the resulting distribution there will be at least one marble in each cup. How many different distributions are possible? 6 8 9 10 12

Put one marble in each, so 4 marble gone. Now you have 2 left. Place 2 in any of the cups, so 4 ways. OR put one each in two of the cups in 4C2 or 6 ways. total - 10 ways
User avatar
B
Alex55
Manager
Manager
Joined: 09 Jan 2024
Posts: 67
Own Kudos [?]: 17 [0]
Given Kudos: 23
Location: Bangladesh
GMAT 1: 760 Q56 V59
Send PM
Re: Re: GRE: Quant question [#permalink] New post   24 Apr 2024, 06:01
When a certain stock exchange closed on Tuesday, 1/5 of the stocks closed at the same price as on the previous day. Of the remaining stocks, 3 stocks closed at a higher price for every 4 stocks that closed at a lower price. What fraction of all the stocks on this exchange closed at a higher price than on the previous day?
12/35
3/7
16/35
4/7
3/4

The function \( f \) is defined by \( f(x)=2^{-x^{2}} \) for all integers \( x \). Which of the following could be the value of \( f(x) \) ?

Indicate all such values.
-2
-1
-0.5
0
0.5
1
2
GMAT Club Bot
gmatclubot
Re: Re: GRE: Quant question [#permalink]
24 Apr 2024, 06:01
   1   2   3   

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions