Last visit was: 17 May 2024, 15:52 It is currently 17 May 2024, 15:52
Decision Tracker
My Rewards
Unanswered
Active Topics
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

Quant Question of the Day Chat

SORT BY:
Date
Kudos
   1  ...  58   59   60   61   62  ...  237   
Tags:
Find Similar Topics 
Show Tags
Hide Tags
User avatar
L
gmatophobia
Quant Chat Moderator
Joined: 22 Dec 2016
Posts: 3133
Own Kudos [?]: 4403 [0]
Given Kudos: 1855
Location: India
Concentration: Strategy, Leadership
Send PM
CAT Tests Forum Quiz Mode
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   Updated on: 29 May 2023, 11:55
shivsharma42 wrote:
Larry, Michael, and Doug have five donuts to share. If any one of the men can be given any whole number of donuts from 0 to 5, in how many different ways can the donuts be distributed? (A) 21 (B) 42 (C) 120 (D) 504 (E) 5040

Let’s bring some twist to this question. :cool:

The number of donuts (all identical) is 10 and each person (L, M, and D) must get to get at least two donuts. In how many different ways can the donuts be distributed?

shivsharma42 wrote:
Larry, Michael, and Doug have five donuts to share. If any one of the men can be given any whole number of donuts from 0 to 5, in how many different ways can the donuts be distributed? (A) 21 (B) 42 (C) 120 (D) 504 (E) 5040

Let’s bring some twist to this question. :cool:

The number of donuts (all identical) is 10 and each person (L, M, and D) must get at least two donuts. In how many different ways can the donuts be distributed?

Originally posted by gmatophobia on 29 May 2023, 11:51.
Last edited by gmatophobia on 29 May 2023, 11:55, edited 1 time in total.
User avatar
S
Shobhit28
Manager
Manager
Joined: 30 Mar 2022
Posts: 64
Own Kudos [?]: 32 [0]
Given Kudos: 13
Location: India
Concentration: Sustainability, Other
GMAT 1: 630 Q47 V29
GPA: 4
WE:Operations (Other)
Send PM
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   Updated on: 30 May 2023, 00:11
If 2^x+2^y=x^2+y^2, where x and y are nonnegative integers, what is the greatest possible value of |x−y|?
a.01234
Manhattan GMAT

Q. 2^x+2^y=x^2+y^2, where x and y are nonnegative integers, what is the greatest possible value of |x−y|?
a. 0 b. 1 c. 2 d. 3 e. 4
Source: Manhattan GMAT: 700 level

Originally posted by Shobhit28 on 30 May 2023, 00:10.
Last edited by Shobhit28 on 30 May 2023, 00:11, edited 1 time in total.
User avatar
S
Shobhit28
Manager
Manager
Joined: 30 Mar 2022
Posts: 64
Own Kudos [?]: 32 [0]
Given Kudos: 13
Location: India
Concentration: Sustainability, Other
GMAT 1: 630 Q47 V29
GPA: 4
WE:Operations (Other)
Send PM
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   30 May 2023, 02:09
AG2907 wrote:
c.2?

No. How are you solving this?
User avatar
B
saby1410
Manager
Manager
Joined: 06 Feb 2017
Posts: 198
Own Kudos [?]: 18 [0]
Given Kudos: 92
Location: India
Send PM
Forum Quiz Mode
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   30 May 2023, 04:39
gmatophobia, Can you teach concepts of circles,tangents,parabola teted in gmat
User avatar
B
chandnik3
Intern
Intern
Joined: 24 May 2023
Posts: 11
Own Kudos [?]: 11 [0]
Given Kudos: 69
Concentration: Finance, Accounting
Send PM
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   30 May 2023, 21:59
A

Because SD always positive or zero. Never negative.
User avatar
S
vdhanuka
Manager
Manager
Joined: 10 Jan 2022
Posts: 68
Own Kudos [?]: 29 [0]
Given Kudos: 6
Send PM
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   30 May 2023, 23:19
as sd cant be negative
User avatar
S
AG2907
Manager
Manager
Joined: 12 Jan 2023
Posts: 170
Own Kudos [?]: 72 [0]
Given Kudos: 53
Send PM
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   31 May 2023, 00:30
But SD is zero only when all values are identical right?
User avatar
B
sg_mba
Intern
Intern
Joined: 27 May 2023
Posts: 21
Own Kudos [?]: 5 [0]
Given Kudos: 11
Location: India
Send PM
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   31 May 2023, 03:31
How to scroll up in this chat. Whenever I try to go up, it reloads the chat
User avatar
B
chandnik3
Intern
Intern
Joined: 24 May 2023
Posts: 11
Own Kudos [?]: 11 [0]
Given Kudos: 69
Concentration: Finance, Accounting
Send PM
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   31 May 2023, 03:58
Shobhit28 wrote:
Yes. How?

2^3+2^0=3^2+0^2=9
Therefore 3-0=3
User avatar
L
gmatophobia
Quant Chat Moderator
Joined: 22 Dec 2016
Posts: 3133
Own Kudos [?]: 4403 [0]
Given Kudos: 1855
Location: India
Concentration: Strategy, Leadership
Send PM
CAT Tests Forum Quiz Mode
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   Updated on: 31 May 2023, 04:04
gmatophobia wrote:
PS Question 1 - May 29 A farmer decides to plant a row of trees along one side of a road. He decides to plant one tree every 15 meters. If the road is 460 meters long what is the maximum number of trees the farmer could plant? A. 28 B. 29 C. 30 D. 31 E. 32 Source: GMATNinja | Difficulty: Medium

Show SpoilerOA
D


gmatophobia wrote:
DS Question 1 - May 29 If vertices of a triangle have coordinates (-1,0), (4,0), and (0,A), is the area of the triangle greater than 15 ? (1) A < 3 (2) The triangle is right Source: GMAT Club Test | Difficulty: Hard

Show SpoilerOA
B


DS Question 1 - May 31

Is p > q ?

(1) p^2 > q

(2) p^3 < q

Source: Expert’s Global | Difficulty: Hard

PS Question 1 - May 31

Let x be a two-digit number. If the sum of the digits of x is 9, then the sum of the digits of the number (x + 10) is

(A) 1

(B) 8

(C) 10

(D) either 8 or 10

(E) either 1 or 10

Source: Others | Difficulty: Hard

Originally posted by gmatophobia on 31 May 2023, 04:01.
Last edited by gmatophobia on 31 May 2023, 04:04, edited 2 times in total.
User avatar
B
sg_mba
Intern
Intern
Joined: 27 May 2023
Posts: 21
Own Kudos [?]: 5 [0]
Given Kudos: 11
Location: India
Send PM
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   31 May 2023, 09:04
gmatophobia wrote:
PS Question 1 - May 31 Let x be a two-digit number. If the sum of the digits of x is 9, then the sum of the digits of the number (x + 10) is (A) 1 (B) 8 (C) 10 (D) either 8 or 10 (E) either 1 or 10 Source: Others | Difficulty: Hard

Option D
1. When x is negative: sum will be 8
2. When x is positive: sum will be 10
User avatar
B
chandnik3
Intern
Intern
Joined: 24 May 2023
Posts: 11
Own Kudos [?]: 11 [0]
Given Kudos: 69
Concentration: Finance, Accounting
Send PM
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   31 May 2023, 09:55
sg_mba wrote:
Option D 1. When x is negative: sum will be 8 2. When x is positive: sum will be 10

But intial statement states that sum of digits is 9.. how can negative number have sum of digits as 9?
User avatar
P
mysterymanrog
CR Forum Moderator
Joined: 25 Jan 2022
Posts: 832
Own Kudos [?]: 644 [0]
Given Kudos: 558
Location: Italy
Schools: HEC (A) LBS (D) ESSEC (A)
GPA: 3.8
Send PM
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   31 May 2023, 11:14
gmatophobia wrote:
PS Question 1 - May 31 Let x be a two-digit number. If the sum of the digits of x is 9, then the sum of the digits of the number (x + 10) is (A) 1 (B) 8 (C) 10 (D) either 8 or 10 (E) either 1 or 10 Source: Others | Difficulty: Hard

Consider the case of x=18
In this case, x+10=28, which means sum of digits 10.
Consider the case of x=90
x+10=100
the sum of digits is 1.
E
User avatar
S
AG2907
Manager
Manager
Joined: 12 Jan 2023
Posts: 170
Own Kudos [?]: 72 [0]
Given Kudos: 53
Send PM
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   31 May 2023, 22:32
Shobhit28 wrote:
Yes

Then what would be the answer?
User avatar
G
wickedvikram
Manager
Manager
Joined: 08 Jun 2008
Posts: 181
Own Kudos [?]: 101 [0]
Given Kudos: 79
Location: India
Concentration: Finance, General Management
Send PM
GMAT ToolKit User Reviews Badge
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   Updated on: 01 Jun 2023, 00:53
gmatophobia wrote:
PS Question 1 - May 31 Let x be a two-digit number. If the sum of the digits of x is 9, then the sum of the digits of the number (x + 10) is (A) 1 (B) 8 (C) 10 (D) either 8 or 10 (E) either 1 or 10 Source: Others | Difficulty: Hard

E

gmatophobia wrote:
DS Question 1 - May 31 Is p > q ? (1) p^2 > q (2) p^3 < q Source: Expert’s Global | Difficulty: Hard

E; -ve or fraction

Originally posted by wickedvikram on 01 Jun 2023, 00:50.
Last edited by wickedvikram on 01 Jun 2023, 00:53, edited 1 time in total.
User avatar
S
sharad1s
Manager
Manager
Joined: 09 May 2023
Posts: 66
Own Kudos [?]: 34 [0]
Given Kudos: 6
Send PM
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   01 Jun 2023, 02:56
mysterymanrog wrote:
Consider the case of x=18 In this case, x+10=28, which means sum of digits 10. Consider the case of x=90 x+10=100 the sum of digits is 1. E

let the number be 10x+y , add 10 to it, it becomes 10x+(y+10), assume that after this operation , the two digit no is of form 10a+b, now compare 10x+10+y with 10a+b , we get , a=x+1 and y=b , so the sum of its digit i.e a+b =x+y+10 =9+1=10
User avatar
L
gmatophobia
Quant Chat Moderator
Joined: 22 Dec 2016
Posts: 3133
Own Kudos [?]: 4403 [0]
Given Kudos: 1855
Location: India
Concentration: Strategy, Leadership
Send PM
CAT Tests Forum Quiz Mode
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   Updated on: 02 Jun 2023, 04:26
gmatophobia wrote:
DS Question 1 - May 31 Is p > q ? (1) p^2 > q (2) p^3 < q Source: Expert’s Global | Difficulty: Hard

Show SpoilerOA
E


gmatophobia wrote:
PS Question 1 - May 31 Let x be a two-digit number. If the sum of the digits of x is 9, then the sum of the digits of the number (x + 10) is (A) 1 (B) 8 (C) 10 (D) either 8 or 10 (E) either 1 or 10 Source: Others | Difficulty: Hard

Show SpoilerOA
E


DS Question 1 - June 6

For each landscaping job that takes more than 4 hours, a certain contractor charges a total of r dollars for the first 4 hours plus 0.2*r dollars for each additional hour or fraction of an hour, where r > 100, Did a particular landscaping job take more than 10 hours.

(1) The contractor charges a total of $288 for the job.
(2) The contractor charges a total of 2.4r dollars for the job.

Source: Official Guide | Difficulty: Hard

PS Question 1 - June 6

9 people, including 3 couples, are to be seated in a row of 9 chairs. What is the probability that only one couple is sitting together

A. 1/63
B. 1/6
C. 8/21
D. 61/126
E. 7/9

Source: Others | Difficulty: Hard

Originally posted by gmatophobia on 02 Jun 2023, 04:23.
Last edited by gmatophobia on 02 Jun 2023, 04:26, edited 2 times in total.
User avatar
B
sg_mba
Intern
Intern
Joined: 27 May 2023
Posts: 21
Own Kudos [?]: 5 [0]
Given Kudos: 11
Location: India
Send PM
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   Updated on: 02 Jun 2023, 04:55
gmatophobia wrote:
DS Question 1 - June 6 For each landscaping job that takes more than 4 hours, a certain contractor charges a total of r dollars for the first 4 hours plus 0.2*r dollars for each additional hour or fraction of an hour, where r > 100, Did a particular landscaping job take more than 10 hours. (1) The contractor charges a total of $288 for the job. (2) The contractor charges a total of 2.4r dollars for the job. Source: Official Guide | Difficulty: Hard

B

A is not sufficient because value of r is unknown

Originally posted by sg_mba on 02 Jun 2023, 04:54.
Last edited by sg_mba on 02 Jun 2023, 04:55, edited 1 time in total.
User avatar
G
wickedvikram
Manager
Manager
Joined: 08 Jun 2008
Posts: 181
Own Kudos [?]: 101 [0]
Given Kudos: 79
Location: India
Concentration: Finance, General Management
Send PM
GMAT ToolKit User Reviews Badge
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   02 Jun 2023, 07:07
gmatophobia wrote:
PS Question 1 - June 6 9 people, including 3 couples, are to be seated in a row of 9 chairs. What is the probability that only one couple is sitting together A. 1/63 B. 1/6 C. 8/21 D. 61/126 E. 7/9 Source: Others | Difficulty: Hard

Hi gmatphobia
I checked twice but I’m getting 11/63. Could you point out the error in below.
P(Only 1C) = P(T)-[p(0C)+P(2+ C)]
{9!-[(9!-8!*2!) + 6!*4!]} / 9! = 11/63
User avatar
G
wickedvikram
Manager
Manager
Joined: 08 Jun 2008
Posts: 181
Own Kudos [?]: 101 [0]
Given Kudos: 79
Location: India
Concentration: Finance, General Management
Send PM
GMAT ToolKit User Reviews Badge
Re: Quant Question of the Day Chat [#permalink] Quant Question of the Day Chat   Updated on: 02 Jun 2023, 09:52
Got it. It’s C - 8/21

P(only 1C) = 3{P(1+ C)-[2*P(only 2C)+P(only 3C)]}
P(only 3C) = 6!*2!*2!*2!/9!
P(only 2C) = P(2+ C)-P(only 3C)= (7!*2!*2!-6!*2!*2!*2!)/9! (for only 1 pair of 2couple, *3 for all )
P(1+ C)=2*8!/9! (for only 1 couple, *3 for all )
Substitute in first eqn to get 8/21

Originally posted by wickedvikram on 02 Jun 2023, 09:42.
Last edited by wickedvikram on 02 Jun 2023, 09:52, edited 1 time in total.
GMAT Club Bot
gmatclubot
Re: Quant Question of the Day Chat [#permalink]
02 Jun 2023, 09:42
   1  ...  58   59   60   61   62  ...  237   
Moderator:
Bunuel
Math Expert
93333 posts