Last visit was: 28 Apr 2026, 22:46 It is currently 28 Apr 2026, 22:46
Home
Messages
Tests
Schools
Events
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
Events & Promotions
Back to Forum
Create Topic
   1  ...  75   76   77   78   79  ...  679   
User avatar
ag8
User avatar
Joined: 19 Feb 2023
Last visit: 06 Feb 2024
Posts: 4
Own Kudos:
1
Given Kudos: 3
Posts: 4
Kudos: 1
Practice Questions Chat 31 Jul 2023, 10:28
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Arpit_Bhardwaj
Yes so 3:20am + 8hrs = 11:20 am is our answer. Correct me if I am wrong or didnt understand you correctly.
Show more
I completely agree with your methodology, I am just saying the initial time is 3:20 pm not 3:20 am
User avatar
Arpit_Bhardwaj
User avatar
Joined: 13 Jun 2023
Last visit: 08 Sep 2023
Posts: 41
Own Kudos:
37
Given Kudos: 2
Posts: 41
Kudos: 37
Practice Questions Chat 31 Jul 2023, 10:28
Kudos
Add Kudos
Bookmarks
Bookmark this Post
ag8
I completely agree with your methodology, I am just saying the initial time is 3:20 pm not 3:20 am
Show more
Ohh sorry my bad.

Arpit_Bhardwaj
Approach is if we think of 3:20am as a loop of time of 24 hours. The clock starts going in reverse direction in double speed so when we move x hours forward in time the clock goes 2x hours in reverse. And the point where these two meets for the first time shall be our answer. And after 8 hrs the actual time will move forward 8 hrs while the clock will move 16 hrs in reverse direction to meet the actual time. So 3:20am+8hrs = 11:20am.
Show more
3:20pm+8hrs = 11:20pm.*

gmatophobia
DS Question 1 - July 31 The integers n and t are positive and n > t > 1. How many different subgroups of t items can be formed from a group of n different items? (1) The number of different subgroups of n − t different items that can be formed from a group of n different items is 680. (2) nt = 51 Source: Kaplan | Difficulty: Hard
Show more
D – EACH ALONE is sufficient.
User avatar
Arpit_Bhardwaj
User avatar
Joined: 13 Jun 2023
Last visit: 08 Sep 2023
Posts: 41
Own Kudos:
37
Given Kudos: 2
Posts: 41
Kudos: 37
Practice Questions Chat 31 Jul 2023, 11:03
Kudos
Add Kudos
Bookmarks
Bookmark this Post
gmatophobia
DS Question 1 - July 31 The integers n and t are positive and n > t > 1. How many different subgroups of t items can be formed from a group of n different items? (1) The number of different subgroups of n − t different items that can be formed from a group of n different items is 680. (2) nt = 51 Source: Kaplan | Difficulty: Hard
Show more
we need to find n/t as per the question.

Statement 1

n/(n-t) = 680

we can find n/t here hence it is sufficient to answer the question.

Statement 2

n*t= 51 = 3*17

we can say n=17 and t=3 from here. because n>t>1 and hence we can deduce it directly.

we can find n/t here hence it is sufficient to answer the question.

Hence (D) Each alone is sufficient.
User avatar
Divyaas
User avatar
Joined: 15 Mar 2023
Last visit: 05 Aug 2023
Posts: 15
Own Kudos:
9
Given Kudos: 24
Posts: 15
Kudos: 9
Practice Questions Chat 31 Jul 2023, 11:10
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Arpit_Bhardwaj
we need to find n/t as per the question. Statement 1 n/(n-t) = 680 we can find n/t here hence it is sufficient to answer the question. Statement 2 n*t= 51 = 3*17 we can say n=17 and t=3 from here. because n>t>1 and hence we can deduce it directly. we can find n/t here hence it is sufficient to answer the question. Hence (D) Each alone is sufficient.
Show more
We are asked the number of subgroups that can be formed. n/t would give us the ways of distributing n things to t places/people?

For example n=3 t= 2
So 3 numbers lets say 1 2 3 into 2 sub groups would be 1 2, 23, 13 which is 3 not 3/2. Thoughts?
User avatar
Dumsy_1711
User avatar
Joined: 23 May 2023
Last visit: 24 Jul 2024
Posts: 57
Own Kudos:
45
Given Kudos: 305
Location: India
Concentration: Real Estate, Sustainability
GPA: 3.7
WE:Other (Other)
Posts: 57
Kudos: 45
Practice Questions Chat 31 Jul 2023, 11:10
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Arpit_Bhardwaj
Approach is if we think of 3:20am as a loop of time of 24 hours. The clock starts going in reverse direction in double speed so when we move x hours forward in time the clock goes 2x hours in reverse. And the point where these two meets for the first time shall be our answer. And after 8 hrs the actual time will move forward 8 hrs while the clock will move 16 hrs in reverse direction to meet the actual time. So 3:20am+8hrs = 11:20am.
Show more
Did you calculate 8 hrs and 16hrs manually? As in, did you check for every hour forward, if 2 hours in reverse match with it? Or did you arrive at 8 and 16 with by applying any other logic?

Never mind, I just got what you’re saying. 8+16 = 24 hours, yes?

which is x and 2x
User avatar
Arpit_Bhardwaj
User avatar
Joined: 13 Jun 2023
Last visit: 08 Sep 2023
Posts: 41
Own Kudos:
37
Given Kudos: 2
Posts: 41
Kudos: 37
Practice Questions Chat 31 Jul 2023, 11:13
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Dumsy_1711
Did you calculate 8 hrs and 16hrs manually? As in, did you check for every hour forward, if 2 hours in reverse match with it? Or did you arrive at 8 and 16 with by applying any other logic?
Show more
Arrived it through logic as I said its a loop of 24 hours and if actual time goes x in forward the the clock would go 2x in reverse direction and sum both x+2x = 24 as only on that point they would meet. So x = 8 hours.

We can do it manually too but I guess that will be more hectic and time consuming as we have to do it with 2-3 mins.
User avatar
Dumsy_1711
User avatar
Joined: 23 May 2023
Last visit: 24 Jul 2024
Posts: 57
Own Kudos:
45
Given Kudos: 305
Location: India
Concentration: Real Estate, Sustainability
GPA: 3.7
WE:Other (Other)
Posts: 57
Kudos: 45
Practice Questions Chat 31 Jul 2023, 11:15
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Thanks, Arpit. :) It looks so simple once you came up with an explanation, and yet, I couldn’t think of any way of addressing it other than checking it hour by hour

Definitely bookmarking your post for later
User avatar
Arpit_Bhardwaj
User avatar
Joined: 13 Jun 2023
Last visit: 08 Sep 2023
Posts: 41
Own Kudos:
37
Given Kudos: 2
Posts: 41
Kudos: 37
Practice Questions Chat 31 Jul 2023, 11:18
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Dumsy_1711
Thanks, Arpit. :) It looks so simple once you came up with an explanation, and yet, I couldn’t think of any way of addressing it other than checking it hour by hour
Show more
You are welcome Dumsy_1711.
User avatar
Mapat
User avatar
Joined: 29 Jul 2023
Last visit: 09 Jul 2024
Posts: 6
Own Kudos:
1
Given Kudos: 25
Posts: 6
Kudos: 1
Practice Questions Chat 31 Jul 2023, 11:26
Kudos
Add Kudos
Bookmarks
Bookmark this Post
D is a 3 digit number such that ratio of number to the sum of it’s digits is least. What is the difference between the digit at hundred’s place and the digit at unit’s place?
User avatar
Arpit_Bhardwaj
User avatar
Joined: 13 Jun 2023
Last visit: 08 Sep 2023
Posts: 41
Own Kudos:
37
Given Kudos: 2
Posts: 41
Kudos: 37
Practice Questions Chat 31 Jul 2023, 11:31
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Divyaas
We are asked the number of subgroups that can be formed. n/t would give us the ways of distributing n things to t places/people? For example n=3 t= 2 So 3 numbers lets say 1 2 3 into 2 sub groups would be 1 2, 23, 13 which is 3 not 3/2. Thoughts?
Show more
Hey I guess you are right and even if we go by permutation and combination the answer comes out to be same as (D). Its a little unclear to me as to if it means we need to tell in how many ways we can form subgroups or we need to tell how many subgroups we can form.
User avatar
Divyaas
User avatar
Joined: 15 Mar 2023
Last visit: 05 Aug 2023
Posts: 15
Own Kudos:
9
Given Kudos: 24
Posts: 15
Kudos: 9
Practice Questions Chat 31 Jul 2023, 11:35
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Arpit_Bhardwaj
Hey I guess you are right and even if we go by permutation and combination the answer comes out to be same as (D). Its a little unclear to me as to if it means we need to tell in how many ways we can form subgroups or we need to tell how many subgroups we can form.
Show more
How many different subgroups can be formed?

And yes, you are right the answer is D anyways.
User avatar
Arpit_Bhardwaj
User avatar
Joined: 13 Jun 2023
Last visit: 08 Sep 2023
Posts: 41
Own Kudos:
37
Given Kudos: 2
Posts: 41
Kudos: 37
Practice Questions Chat 31 Jul 2023, 11:40
Kudos
Add Kudos
Bookmarks
Bookmark this Post
How many different subgroups can be formed?

One interpretation is of choosing and making subgroups like you illustrated above.

Second interpretation that I did while reading the question was how many different subgroups with t items can be formed with n different items.n=10 and t=2 So like how many different subgroups can be formed of 2 items from 10 different items.
User avatar
Divyaas
User avatar
Joined: 15 Mar 2023
Last visit: 05 Aug 2023
Posts: 15
Own Kudos:
9
Given Kudos: 24
Posts: 15
Kudos: 9
Practice Questions Chat 31 Jul 2023, 11:47
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Arpit_Bhardwaj
How many different subgroups can be formed? One interpretation is of choosing and making subgroups like you illustrated above. Second interpretation that I did while reading the question was how many different subgroups with t items can be formed with n different items.n=10 and t=2 So like how many different subgroups can be formed of 2 items from 10 different items.
Show more
Right
Generally sets brings in the idea of subgroups to me. But this question doesn’t have that. So even I am not sure how to point that out.
User avatar
Arpit_Bhardwaj
User avatar
Joined: 13 Jun 2023
Last visit: 08 Sep 2023
Posts: 41
Own Kudos:
37
Given Kudos: 2
Posts: 41
Kudos: 37
Practice Questions Chat 31 Jul 2023, 11:51
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Divyaas
Right Generally sets brings in the idea of subgroups to me. But this question doesn’t have that. So even I am not sure how to point that out.
Show more
Yeah and generally a P&C question contains "in how many ways" or specially a sense of choosing or forming groups. Also generally dividing a group into subgroups would simply mean to divide then and not like choose and form different ways of forming just one subgroup.

Arpit_Bhardwaj
Yeah and generally a P&C question contains "in how many ways" or specially a sense of choosing or forming groups. Also generally dividing a group into subgroups would simply mean to divide then and not like choose and form different ways of forming just one subgroup.
Show more
I can be wrong though but this is my observation uptill now.
User avatar
Divyaas
User avatar
Joined: 15 Mar 2023
Last visit: 05 Aug 2023
Posts: 15
Own Kudos:
9
Given Kudos: 24
Posts: 15
Kudos: 9
Practice Questions Chat 31 Jul 2023, 11:56
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Thanks for your inputs. 😋
User avatar
Arpit_Bhardwaj
User avatar
Joined: 13 Jun 2023
Last visit: 08 Sep 2023
Posts: 41
Own Kudos:
37
Given Kudos: 2
Posts: 41
Kudos: 37
Practice Questions Chat 31 Jul 2023, 11:59
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Divyaas
Thanks for your inputs. 😋
Show more
Sure and thanks for pointing it out. :)
User avatar
Theprince
User avatar
Joined: 14 May 2022
Last visit: 13 Jan 2025
Posts: 16
Own Kudos:
19
Given Kudos: 79
Location: India
Schools: Tepper '26 (WL) Kenan-Flagler '26 (WL) Kelley '26 (D) Stern '26 (S) Cornell '26 (S) Darden '26 (II) McCombs '26 (S) Scheller '26 (S) Marshall '26 (S) ISB '25 (A)
GMAT 1: 690 Q50 V32
GMAT 2: 750 Q50 V41
GPA: 3.64
WE:Analyst (Manufacturing)
Schools: Tepper '26 (WL) Kenan-Flagler '26 (WL) Kelley '26 (D) Stern '26 (S) Cornell '26 (S) Darden '26 (II) McCombs '26 (S) Scheller '26 (S) Marshall '26 (S) ISB '25 (A)
GMAT 2: 750 Q50 V41
Posts: 16
Kudos: 19
Practice Questions Chat 31 Jul 2023, 12:51
Kudos
Add Kudos
Bookmarks
Bookmark this Post
gmatophobia
DS Question 1 - July 31 The integers n and t are positive and n > t > 1. How many different subgroups of t items can be formed from a group of n different items? (1) The number of different subgroups of n − t different items that can be formed from a group of n different items is 680. (2) nt = 51 Source: Kaplan | Difficulty: Hard
Show more
d - 1. n C T = n C n-t suff 2. only possible n =17 t =3 suff
User avatar
aman_kumar
User avatar
Joined: 31 May 2023
Last visit: 05 Oct 2023
Posts: 17
Own Kudos:
12
Given Kudos: 11
Location: India
Concentration: General Management, Other
GPA: 4
Posts: 17
Kudos: 12
Practice Questions Chat 01 Aug 2023, 05:35
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Jim needs to mix a solution in the following ratio: 1 part bleach for every 4 parts water. When mixing the solution, Jim makes a mistake and mixes in half as much bleach as he ought to have. The total solution consists of 18 mL. How much did Jim put into the solution?

A. 1mL
B. 2mL
C. 3mL
D. 4mL
E. 5mL
avatar
slk00
avatar
Joined: 06 Jan 2023
Last visit: 19 Feb 2025
Posts: 169
Own Kudos:
81
Given Kudos: 127
Location: India
Concentration: International Business, Technology
Schools: Booth (Chicago) (D) ESSEC (A) HEC (M) Duke Fuqua (A$) Kellogg MiM "26 (D) INSEAD MiM "26 (D)
GMAT 1: 530 Q40 V21
GMAT 2: 720 Q47 V42
GPA: 4
WE:Information Technology (Healthcare/Pharmaceuticals)
Schools: Booth (Chicago) (D) ESSEC (A) HEC (M) Duke Fuqua (A$) Kellogg MiM "26 (D) INSEAD MiM "26 (D)
GMAT 2: 720 Q47 V42
Posts: 169
Kudos: 81
Practice Questions Chat 01 Aug 2023, 06:09
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Mapat
D is a 3 digit number such that ratio of number to the sum of it’s digits is least. What is the difference between the digit at hundred’s place and the digit at unit’s place?
Show more
Correct me if I’m wrong, but if the ratio is least, Then we need to make sure D/(sum of digits) of D is least.
100 is the smallest 3 digit number, but the sum of its digit is small too. To get the smallest ratio, let’s consider this:
999 is the largest number, but the sum of its digits is very large.
On the other hand 199 is a small 3 digit number whose sum of digits is large enough to minimise the ratio (1+9+9 = 19).
Therefore, D = 199.
(D/19 ~= 10.4)
Difference between the hundreds and units place = 8.
User avatar
Deepihu
User avatar
Joined: 25 Jul 2023
Last visit: 24 Dec 2023
Posts: 13
Own Kudos:
9
Given Kudos: 6
Location: India
Posts: 13
Kudos: 9
Practice Questions Chat 01 Aug 2023, 08:27
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Deepihu
Two
Show more
Ans is 11
Two digit no. 9
Three digit no 2
   1  ...  75   76   77   78   79  ...  679   
Moderators:
gchandana
193 posts
MBAACCOUNT2025
General GMAT Forum Moderator
474 posts