Last visit was: 07 Sep 2026, 01:46 It is currently 07 Sep 2026, 01:46
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
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 06 Sep 2026
Posts: 113,179
Own Kudos:
839,649
 [2]
Given Kudos: 111,357
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 113,179
Kudos: 839,649
 [2]
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
User avatar
Skywalker18
User avatar
Retired Moderator
Joined: 08 Dec 2013
Last visit: 15 Nov 2023
Posts: 1,969
Own Kudos:
Given Kudos: 171
Status:Greatness begins beyond your comfort zone
Location: India
Concentration: General Management, Strategy
GPA: 3.2
WE:Information Technology (Consulting)
Products:
Posts: 1,969
Kudos: 10,392
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
Abhishek009
User avatar
Board of Directors
Joined: 11 Jun 2011
Last visit: 17 Dec 2025
Posts: 5,881
Own Kudos:
Given Kudos: 463
Status:QA & VA Forum Moderator
Location: India
GPA: 3.5
WE:Business Development (Commercial Banking)
Posts: 5,881
Kudos: 5,538
Kudos
Add Kudos
Bookmarks
Bookmark this Post
avatar
OptimusPrepJanielle
Joined: 06 Nov 2014
Last visit: 08 Sep 2017
Posts: 1,776
Own Kudos:
Given Kudos: 23
Expert
Expert reply
Posts: 1,776
Kudos: 1,529
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to British stamps is 5 to 1, what is the ratio of US to British stamps?

A. 5 : 1
B. 10 : 5
C. 15 : 2
D. 20 : 2
E. 25 : 2

US: Indian = 5:2 = 25:10
Indian: British = 5:1 = 10:2

Hence US: Indian: British = 25:10:2
US: British = 25:2

Correct Option: E
User avatar
Divyadisha
User avatar
Current Student
Joined: 18 Oct 2014
Last visit: 01 Jun 2018
Posts: 659
Own Kudos:
Given Kudos: 69
Location: United States
GMAT 1: 660 Q49 V31
GPA: 3.98
GMAT 1: 660 Q49 V31
Posts: 659
Kudos: 1,973
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to British stamps is 5 to 1, what is the ratio of US to British stamps?

A. 5 : 1
B. 10 : 5
C. 15 : 2
D. 20 : 2
E. 25 : 2

US:I= 5:2

I:B= 5:1

Multiply US:I by 5 and I:B by 2

US:I:B= 25:10:2

E is the answer
User avatar
GMATinsight
User avatar
Major Poster
Joined: 08 Jul 2010
Last visit: 05 Sep 2026
Posts: 7,294
Own Kudos:
Given Kudos: 128
Status:GMAT/GRE Tutor l Admission Consultant l On-Demand Course creator
Location: India
GMAT: QUANT+DI EXPERT
Schools: IIM (A) ISB '24
GMAT 1: 750 Q51 V41
WE:Education (Education)
Products:
Expert
Expert reply
Schools: IIM (A) ISB '24
GMAT 1: 750 Q51 V41
Posts: 7,294
Kudos: 17,487
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to British stamps is 5 to 1, what is the ratio of US to British stamps?

A. 5 : 1
B. 10 : 5
C. 15 : 2
D. 20 : 2
E. 25 : 2

U/I = 5/2

I/B = 5/1

Since I is multiple of both 2 (as per first ratio) and 5 (as per second ratio) so let's assume that I = 10
i.e. Multiplying teh first ratio by 5 and second ration by 2 in each numerator and denominator

then, U : I : B = 25 : 10 : 2

i.e. U : B = 25 : 2

Answer: Option E
User avatar
Kinshook
User avatar
Major Poster
Joined: 03 Jun 2019
Last visit: 07 Sep 2026
Posts: 6,129
Own Kudos:
Given Kudos: 164
Location: India
GMAT 1: 690 Q50 V34
WE:Engineering (Transportation)
Products:
GMAT 1: 690 Q50 V34
Posts: 6,129
Kudos: 6,089
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Bunuel
Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to British stamps is 5 to 1, what is the ratio of US to British stamps?

A. 5 : 1
B. 10 : 5
C. 15 : 2
D. 20 : 2
E. 25 : 2

Ratio of US : Indian stamps = 5:2
Ratio of Indian : British stamps = 5:1

Ratio of US : Indian : British stamps = 25:10:2
Ratio of US : British stamps = 25:2

IMO E

Posted from my mobile device
Moderator:
Math Expert
113179 posts