Last visit was: 24 Mar 2025, 13:24 It is currently 24 Mar 2025, 13:24
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.
Close
Request Expert Reply
Confirm Cancel
User avatar
gmatophobia
User avatar
Quant Chat Moderator
Joined: 22 Dec 2016
Last visit: 23 Mar 2025
Posts: 3,115
Own Kudos:
Given Kudos: 1,860
Location: India
Concentration: Strategy, Leadership
Products:
Posts: 3,115
Kudos: 7,922
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
gmatophobia
User avatar
Quant Chat Moderator
Joined: 22 Dec 2016
Last visit: 23 Mar 2025
Posts: 3,115
Own Kudos:
Given Kudos: 1,860
Location: India
Concentration: Strategy, Leadership
Products:
Posts: 3,115
Kudos: 7,922
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
av1901
Joined: 28 May 2022
Last visit: 19 Dec 2024
Posts: 429
Own Kudos:
Given Kudos: 83
Status:Dreaming and Working
Affiliations: None
WE:Brand Management (Manufacturing)
Products:
Posts: 429
Kudos: 431
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
gmatophobia
User avatar
Quant Chat Moderator
Joined: 22 Dec 2016
Last visit: 23 Mar 2025
Posts: 3,115
Own Kudos:
Given Kudos: 1,860
Location: India
Concentration: Strategy, Leadership
Products:
Posts: 3,115
Kudos: 7,922
Kudos
Add Kudos
Bookmarks
Bookmark this Post
av1901
gmatophobia
I think you got it.

Statement 1

9x = 2xy + 5
x(9 - 2y) = 5
5 is prime and we can express as 1 * 5 or 5 * 1
x = 1 and 9 - 2y = 5; i.e. y = 2
Now if y = 2, 2y is 4 and we cannot have remainder as 5.

Thus we can eliminate that case and x = 5

Statement 2

5y - xy = 0
y(5-x) = 0

y cannot be zero as the constraint say that it is +ve.

So, x = 5
In the second statement, can’t we just cancel y on both sides since its the same value?
In this case you can :)
User avatar
av1901
Joined: 28 May 2022
Last visit: 19 Dec 2024
Posts: 429
Own Kudos:
Given Kudos: 83
Status:Dreaming and Working
Affiliations: None
WE:Brand Management (Manufacturing)
Products:
Posts: 429
Kudos: 431
Kudos
Add Kudos
Bookmarks
Bookmark this Post
gmatophobia
Nov 07 - Question of the day

The median of n consecutive odd integers is 30. If the fifth term is 33, then which of the following can be the last term of the sequence?

A.19
B.21
C.25
D.33
E.41

Source: eGMAT | Difficulty : Hard
Well, the trick here is realizing that it is a descending order AP with consecutive odd integers

Median of 2 odd integers = 30 => That number of terms is EVEN (because if it were odd, then median would have been the middle term and thus odd as well) = (29+31)/2

And initially you think that Since a5 = 33, so 31 = a4 and 29 = a3

Since median of even set of numbers = Average of (n/2) and (n/2 + 1)th terms, WHICH WOULD GIVE US n = 6, and a6 would be 35 BUT THERE IS NO OPTION LIKE THAT and most options are below 33

So that means that a5 = 33, and 31 = a6 and 29 = a7, So n = 12

Calculate a12 would give us 19

Answer: A
User avatar
gmatophobia
User avatar
Quant Chat Moderator
Joined: 22 Dec 2016
Last visit: 23 Mar 2025
Posts: 3,115
Own Kudos:
Given Kudos: 1,860
Location: India
Concentration: Strategy, Leadership
Products:
Posts: 3,115
Kudos: 7,922
Kudos
Add Kudos
Bookmarks
Bookmark this Post
DS Butler Question - 1

If x and y are positive integers, are they consecutive?

(1) x + y = 3
(2) x - y = 1

Source: Math Revolution | Difficulty : Medium
User avatar
av1901
Joined: 28 May 2022
Last visit: 19 Dec 2024
Posts: 429
Own Kudos:
Given Kudos: 83
Status:Dreaming and Working
Affiliations: None
WE:Brand Management (Manufacturing)
Products:
Posts: 429
Kudos: 431
Kudos
Add Kudos
Bookmarks
Bookmark this Post
gmatophobia
DS Butler Question - 1

If x and y are positive integers, are they consecutive?

(1) x + y = 3
(2) x - y = 1

Source: Math Revolution | Difficulty : Medium
1) if x and y are positive integers, only 1 and 2 satisfy this condition . SUFFICIENT
2) Any 2 consecutive integers when subtracted will give answer as 1. SUFFICIENT

Answer: D
User avatar
gmatophobia
User avatar
Quant Chat Moderator
Joined: 22 Dec 2016
Last visit: 23 Mar 2025
Posts: 3,115
Own Kudos:
Given Kudos: 1,860
Location: India
Concentration: Strategy, Leadership
Products:
Posts: 3,115
Kudos: 7,922
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Concept of the day - Statistics

Let’s focus on Statistics in this week. This is the first of a two part article written by eGMAT. Will post the second part on Thursday :D

Link: Solve any Mean and Standard deviation question under a minute
Written by - eGMAT

Need more ? Below is the link to ALL IN ONE TOPIC on Statistics - Compiled by quant master Bunuel

Link: Statistics Made Easy - All in One Topic

Will share questions on this topic later during the day. Happy reading everyone !
User avatar
gmatophobia
User avatar
Quant Chat Moderator
Joined: 22 Dec 2016
Last visit: 23 Mar 2025
Posts: 3,115
Own Kudos:
Given Kudos: 1,860
Location: India
Concentration: Strategy, Leadership
Products:
Posts: 3,115
Kudos: 7,922
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Problem Solving : Question 1

A set of 31 integers has a median of 31 and a range of 31. What is the greatest possible value of the highest integer in the set?

(A) 46
(B) 47
(C) 60
(D) 61
(E) 62

Source: Expert’s Global | Difficulty: Medium
User avatar
gmatophobia
User avatar
Quant Chat Moderator
Joined: 22 Dec 2016
Last visit: 23 Mar 2025
Posts: 3,115
Own Kudos:
Given Kudos: 1,860
Location: India
Concentration: Strategy, Leadership
Products:
Posts: 3,115
Kudos: 7,922
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Data Sufficiency : Question 1

The median age of seven children in group A was 13. The median age of nine children in group B was 9. Four children — the youngest and the oldest in each group — were exchanged between the groups. What was the new median age of the children in group B?

(1) Before the exchange, the oldest child in group B was 12 years old.

(2) Before the exchange, the youngest child in group A was 8 years old.

Source: Expert’s Global | Difficulty: Medium
User avatar
gmatophobia
User avatar
Quant Chat Moderator
Joined: 22 Dec 2016
Last visit: 23 Mar 2025
Posts: 3,115
Own Kudos:
Given Kudos: 1,860
Location: India
Concentration: Strategy, Leadership
Products:
Posts: 3,115
Kudos: 7,922
Kudos
Add Kudos
Bookmarks
Bookmark this Post
gmatophobia
Problem Solving : Question 1

A set of 31 integers has a median of 31 and a range of 31. What is the greatest possible value of the highest integer in the set?

(A) 46
(B) 47
(C) 60
(D) 61
(E) 62

Source: Expert’s Global | Difficulty: Medium

Problem Solving : Question 2

A garden center sells a certain grass seed in 5-pound bags at $13.85 per bag, 10-pound bags at $20.43 per bag, and 25-pound bags $32.25 per bag. If a customer is to buy at least 65 pounds of the grass seed, but no more than 80 pounds, what is the least possible cost of the grass seed that the customer will buy?

A) $94.03
B) $96.75
C) $98.78
D) $102.07
E) $105.3

Source: Official Guide | Difficulty : Medium
User avatar
Bhartesh0803
Joined: 27 Sep 2022
Last visit: 17 Apr 2024
Posts: 22
Own Kudos:
Given Kudos: 27
Location: India
Posts: 22
Kudos: 8
Kudos
Add Kudos
Bookmarks
Bookmark this Post
C

gmatophobia
Data Sufficiency : Question 1

The median age of seven children in group A was 13. The median age of nine children in group B was 9. Four children — the youngest and the oldest in each group — were exchanged between the groups. What was the new median age of the children in group B?

(1) Before the exchange, the oldest child in group B was 12 years old.

(2) Before the exchange, the youngest child in group A was 8 years old.

Source: Expert’s Global | Difficulty: Medium
B
User avatar
DHRJ0032
Joined: 27 Feb 2020
Last visit: 20 Dec 2023
Posts: 101
Own Kudos:
Given Kudos: 124
Location: India
Concentration: Finance, Operations
GPA: 4
WE:Operations (Aerospace and Defense)
Posts: 101
Kudos: 104
Kudos
Add Kudos
Bookmarks
Bookmark this Post
gmatophobia
Problem Solving : Question 2

A garden center sells a certain grass seed in 5-pound bags at $13.85 per bag, 10-pound bags at $20.43 per bag, and 25-pound bags $32.25 per bag. If a customer is to buy at least 65 pounds of the grass seed, but no more than 80 pounds, what is the least possible cost of the grass seed that the customer will buy?

A) $94.03
B) $96.75
C) $98.78
D) $102.07
E) $105.3

Source: Official Guide | Difficulty : Medium
32.25 x 3 = 96.75 B it is?

gmatophobia
Data Sufficiency : Question 1

The median age of seven children in group A was 13. The median age of nine children in group B was 9. Four children — the youngest and the oldest in each group — were exchanged between the groups. What was the new median age of the children in group B?

(1) Before the exchange, the oldest child in group B was 12 years old.

(2) Before the exchange, the youngest child in group A was 8 years old.

Source: Expert’s Global | Difficulty: Medium
B?
User avatar
gmatophobia
User avatar
Quant Chat Moderator
Joined: 22 Dec 2016
Last visit: 23 Mar 2025
Posts: 3,115
Own Kudos:
Given Kudos: 1,860
Location: India
Concentration: Strategy, Leadership
Products:
Posts: 3,115
Kudos: 7,922
Kudos
Add Kudos
Bookmarks
Bookmark this Post
gmatophobia
Problem Solving : Question 2

A garden center sells a certain grass seed in 5-pound bags at $13.85 per bag, 10-pound bags at $20.43 per bag, and 25-pound bags $32.25 per bag. If a customer is to buy at least 65 pounds of the grass seed, but no more than 80 pounds, what is the least possible cost of the grass seed that the customer will buy?

A) $94.03
B) $96.75
C) $98.78
D) $102.07
E) $105.3

Source: Official Guide | Difficulty : Medium

Data Sufficiency : Question 2

Is the range of a combined set (S,T) is bigger than the sum of ranges of sets S and T ?

(1) The largest element of T is bigger than the largest element of S.

(2) The smallest element of T is bigger than the largest element of S.

Source: GMAT Club Tests | Difficulty: Hard
User avatar
av1901
Joined: 28 May 2022
Last visit: 19 Dec 2024
Posts: 429
Own Kudos:
Given Kudos: 83
Status:Dreaming and Working
Affiliations: None
WE:Brand Management (Manufacturing)
Products:
Posts: 429
Kudos: 431
Kudos
Add Kudos
Bookmarks
Bookmark this Post
gmatophobia
Problem Solving : Question 1

A set of 31 integers has a median of 31 and a range of 31. What is the greatest possible value of the highest integer in the set?

(A) 46
(B) 47
(C) 60
(D) 61
(E) 62

Source: Expert’s Global | Difficulty: Medium
Since there is no constraint over the integers being distinct, we can safely assume that every integer up-to the median (16th term) = 31
So if range = 31 then highest number of set = 31+31 = 62
User avatar
HSogani
Joined: 24 Jul 2020
Last visit: 18 Dec 2022
Posts: 18
Own Kudos:
Given Kudos: 33
Location: India
Concentration: Marketing, Finance
GPA: 3.88
Posts: 18
Kudos: 8
Kudos
Add Kudos
Bookmarks
Bookmark this Post
gmatophobia
Data Sufficiency : Question 2

Is the range of a combined set (S,T) is bigger than the sum of ranges of sets S and T ?

(1) The largest element of T is bigger than the largest element of S.

(2) The smallest element of T is bigger than the largest element of S.

Source: GMAT Club Tests | Difficulty: Hard
B?
User avatar
AbhinavKumar
Joined: 21 Feb 2020
Last visit: 10 May 2024
Posts: 201
Own Kudos:
Given Kudos: 347
Location: India
Concentration: Finance, Leadership
GMAT 1: 640 Q46 V32
GMAT 2: 670 Q48 V34
WE:Information Technology (Consulting)
GMAT 2: 670 Q48 V34
Posts: 201
Kudos: 167
Kudos
Add Kudos
Bookmarks
Bookmark this Post
gmatophobia
Data Sufficiency : Question 2

Is the range of a combined set (S,T) is bigger than the sum of ranges of sets S and T ?

(1) The largest element of T is bigger than the largest element of S.

(2) The smallest element of T is bigger than the largest element of S.

Source: GMAT Club Tests | Difficulty: Hard
B?
User avatar
gmatophobia
User avatar
Quant Chat Moderator
Joined: 22 Dec 2016
Last visit: 23 Mar 2025
Posts: 3,115
Own Kudos:
Given Kudos: 1,860
Location: India
Concentration: Strategy, Leadership
Products:
Posts: 3,115
Kudos: 7,922
Kudos
Add Kudos
Bookmarks
Bookmark this Post
gmatophobia
Data Sufficiency : Question 2

Is the range of a combined set (S,T) is bigger than the sum of ranges of sets S and T ?

(1) The largest element of T is bigger than the largest element of S.

(2) The smallest element of T is bigger than the largest element of S.

Source: GMAT Club Tests | Difficulty: Hard

gmatophobia
Data Sufficiency : Question 1

The median age of seven children in group A was 13. The median age of nine children in group B was 9. Four children — the youngest and the oldest in each group — were exchanged between the groups. What was the new median age of the children in group B?

(1) Before the exchange, the oldest child in group B was 12 years old.

(2) Before the exchange, the youngest child in group A was 8 years old.

Source: Expert’s Global | Difficulty: Medium

Problem Solving : Question 3

Set Q consists of the following five numbers: Q = {5, 8, 13, 21, 34}. Which of the following sets has the same standard deviation as Set Q?

I. {35, 38, 43, 51, 64}
II. {10, 16, 26, 42, 68}
III. {46, 59, 67, 72, 75}

(A) I only
(B) I & II
(C) I & III
(D) II & III
(E) I, II, & III

Source: Magoosh | Difficulty : Hard
User avatar
gmatophobia
User avatar
Quant Chat Moderator
Joined: 22 Dec 2016
Last visit: 23 Mar 2025
Posts: 3,115
Own Kudos:
Given Kudos: 1,860
Location: India
Concentration: Strategy, Leadership
Products:
Posts: 3,115
Kudos: 7,922
Kudos
Add Kudos
Bookmarks
Bookmark this Post
gmatophobia
Problem Solving : Question 3

Set Q consists of the following five numbers: Q = {5, 8, 13, 21, 34}. Which of the following sets has the same standard deviation as Set Q?

I. {35, 38, 43, 51, 64}
II. {10, 16, 26, 42, 68}
III. {46, 59, 67, 72, 75}

(A) I only
(B) I & II
(C) I & III
(D) II & III
(E) I, II, & III

Source: Magoosh | Difficulty : Hard

Nov 09 - Data Sufficiency Question of the Day

The function f is defined for all positive integers n > 4 as f(n) = 3n – 9 if n is odd and f(n) = 2n – 7 if n is even. What is the value of the positive integer a?

(1) f(f(a)) = a

(2) f(f(f(a))) is odd.

Source: Manhattan | Difficulty : Hard
User avatar
gmatophobia
User avatar
Quant Chat Moderator
Joined: 22 Dec 2016
Last visit: 23 Mar 2025
Posts: 3,115
Own Kudos:
Given Kudos: 1,860
Location: India
Concentration: Strategy, Leadership
Products:
Posts: 3,115
Kudos: 7,922
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Nov 09 - Problem Solving Question of the Day

If the sum of all positive factors of an integer n is 2n, n is a perfect number. For example, the factors of 6 are 1, 2, 3, and 6, and from the sum 1+2+3+6=12=2*6, the sum of the factors of 6 becomes 12=2*6, thus 6 is the first perfect number. Then, what is the number of factors of the second perfect number?

A. 4
B. 5
C. 6
D. 8
E. 12

Source: Math Revolution | Difficulty: Hard
   1  ...  6   7   8   9   10  ...  402   
Moderator:
General GMAT Forum Moderator
288 posts