Last visit was: 20 Jul 2025, 12:32 It is currently 20 Jul 2025, 12:32
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
705-805 Level|   Graphs|               
User avatar
LalaB
User avatar
Current Student
Joined: 23 Oct 2010
Last visit: 17 Jul 2016
Posts: 228
Own Kudos:
1,270
 [102]
Given Kudos: 73
Location: Azerbaijan
Concentration: Finance
Schools: HEC '15 (A)
GMAT 1: 690 Q47 V38
Schools: HEC '15 (A)
GMAT 1: 690 Q47 V38
Posts: 228
Kudos: 1,270
 [102]
4
Kudos
Add Kudos
97
Bookmarks
Bookmark this Post
Most Helpful Reply
avatar
mevicks
Joined: 02 Oct 2014
Last visit: 15 May 2019
Posts: 10
Own Kudos:
151
 [40]
Given Kudos: 154
Products:
Posts: 10
Kudos: 151
 [40]
27
Kudos
Add Kudos
12
Bookmarks
Bookmark this Post
avatar
ka47
Joined: 19 Dec 2013
Last visit: 06 Aug 2014
Posts: 1
Own Kudos:
16
 [16]
Posts: 1
Kudos: 16
 [16]
13
Kudos
Add Kudos
3
Bookmarks
Bookmark this Post
General Discussion
User avatar
EMPOWERgmatRichC
User avatar
Major Poster
Joined: 19 Dec 2014
Last visit: 31 Dec 2023
Posts: 21,788
Own Kudos:
12,505
 [6]
Given Kudos: 450
Status:GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Expert
Expert reply
GMAT 1: 800 Q51 V49
GRE 1: Q170 V170
Posts: 21,788
Kudos: 12,505
 [6]
5
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
Hi Rajibuddin,

This IR prompt is similar to a Quant PS Sequence question; you'll probably find it easiest to TEST VALUES to get to the correct answer.

Based on the description, we're told that when a node (a circle) has an arrow pointing to another node (another circle), there's a relationship between the two values. The first circle (the parent node) has a value that is DOUBLE that of the second circle (the child node; the one that is pointed TO).

As an example, look at the first 2 circles (the "A" and the one that "A" is pointing to). Those circles COULD have respective values of 2 and 1, 4 and 2, 6 and 3, 8 and 4, etc. To be fair, the prompt did NOT state that the values had to be integers, so we could have 3 and 1.5, 2.08 and 1.04, etc.

By extension, a longer "string" of nodes must also have values that DOUBLE from node to node. Notice the 3 circles (the "A", the "blank" and the "B"). Their respective values could be 4-2-1, 8-4-2, 12-6-3, 10-5-2.5, etc.

These examples are note-worthy in that they show how TESTing VALUES can help you to figure out the relationships of the various nodes. This question asks us to find 2 nodes - one that has DOUBLE the value of another.

Let's start with the 4th node (the one between the "B" and "C" nodes). Let's give THAT node a value of 1. DOUBLING each value as we go, we'd have....

1....2 (the "B" node)....4......8 (the "A" node)

Now, going in the other direction...
1....2 (the "C" node)....4....8.....16 (the "D" node)

From this, we can see that the "D" node is DOUBLE the "A" node.

Thus, the correct answer is
D and A
.

GMAT assassins aren't born, they're made,
Rich
User avatar
IN2MBB2PE
Joined: 20 Aug 2020
Last visit: 17 Feb 2024
Posts: 131
Own Kudos:
35
 [2]
Given Kudos: 82
Posts: 131
Kudos: 35
 [2]
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
What tripped me was that the question never say what a "principle" node is ....
User avatar
GMATCoachBen
Joined: 21 Mar 2017
Last visit: 19 Jul 2025
Posts: 424
Own Kudos:
2,302
 [6]
Given Kudos: 206
Status:Professional GMAT Trainer
Affiliations: GMAT Coach
Location: United States (WA)
GMAT 1: 760 Q50 V44
GMAT 2: 770 Q51 V44
GMAT 3: 770 Q50 V44
GMAT 4: 770 Q50 V45 (Online)
GMAT 5: 780 Q51 V48
Products:
Expert
Expert reply
GMAT 5: 780 Q51 V48
Posts: 424
Kudos: 2,302
 [6]
5
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
Short video solution here (2:21):


Attachments

2023-12-16 19_56_18-No name - 16 December 2023 (2).mp4 - VLC media player.png
2023-12-16 19_56_18-No name - 16 December 2023 (2).mp4 - VLC media player.png [ 3.28 MiB | Viewed 14683 times ]

User avatar
mmdfl
Joined: 06 Aug 2022
Last visit: 13 Dec 2024
Posts: 108
Own Kudos:
223
 [1]
Given Kudos: 165
Location: Brazil
Concentration: Technology, Economics
Posts: 108
Kudos: 223
 [1]
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
dev21212121
Joined: 04 Nov 2024
Last visit: 09 Jul 2025
Posts: 4
Given Kudos: 12
Posts: 4
Kudos: 0
Kudos
Add Kudos
Bookmarks
Bookmark this Post
What's the ideal time to solve this question? i got the answer right in 4 mins just started with DI today.
Moderators:
Math Expert
102633 posts
455 posts