Last visit was: 15 Jul 2025, 06:12 It is currently 15 Jul 2025, 06:12
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: 14 Jul 2025
Posts: 102,576
Own Kudos:
741,547
 [7]
Given Kudos: 98,190
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 102,576
Kudos: 741,547
 [7]
Kudos
Add Kudos
7
Bookmarks
Bookmark this Post
User avatar
ENGRTOMBA2018
Joined: 20 Mar 2014
Last visit: 01 Dec 2021
Posts: 2,328
Own Kudos:
Given Kudos: 816
Concentration: Finance, Strategy
GMAT 1: 750 Q49 V44
GPA: 3.7
WE:Engineering (Aerospace and Defense)
Products:
GMAT 1: 750 Q49 V44
Posts: 2,328
Kudos: 3,787
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
VenoMfTw
Joined: 14 Mar 2014
Last visit: 15 Aug 2019
Posts: 135
Own Kudos:
Given Kudos: 124
GMAT 1: 710 Q50 V34
GMAT 1: 710 Q50 V34
Posts: 135
Kudos: 473
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
peachfuzz
Joined: 28 Feb 2014
Last visit: 27 Jan 2018
Posts: 269
Own Kudos:
Given Kudos: 132
Location: United States
Concentration: Strategy, General Management
Products:
Posts: 269
Kudos: 350
Kudos
Add Kudos
Bookmarks
Bookmark this Post
4 stages: blue, yellow, red, white. we re not given the distance of the stages. we need to find the distance of each stage in order to have enough info to find the average speed.


(1) The red and blue stages combined are 55 miles long.
no info on the distances of yellow or white
insufficient

(2) The blue and yellow stages combined are 42 miles long.
no info on the distances of red or white
insufficient

combined, there is still no info on the distance of white
Insufficient

Answer: E
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 14 Jul 2025
Posts: 102,576
Own Kudos:
741,547
 [2]
Given Kudos: 98,190
Products:
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 102,576
Kudos: 741,547
 [2]
Kudos
Add Kudos
2
Bookmarks
Bookmark this Post
Bunuel
A bicycle rider rides four stages of a race in 2 hours and 45 minutes. The four stages are named with four different colors: blue, yellow, red, and white. What is the rider’s average speed for the whole race?

(1) The red and blue stages combined are 55 miles long.
(2) The blue and yellow stages combined are 42 miles long.

Kudos for a correct solution.

PRINCETON REVIEW OFFICIAL SOLUTION:

Before looking closely at the statements, we should consider the question and determine what we’re looking for. The question asks for an average speed, so this is a question about rates and we should write down the rate formula: Rate = Distance / Time. The time is given to us, so the only thing we need to know in order to find the rate is the distance. That’s the missing piece of this puzzle. This means that when we turn to the statements we’re no longer thinking about rate, we’re thinking about distance. If the statement allows us to find the total distance of the race then it is sufficient. If not, it’s insufficient.

Statement 1 tells us the combined distance of two of the stages, but that isn’t enough to know the distance of the whole race. Thus Statement 1 is insufficient.

Statement 2 also tells us the combined distance of only two stages, and is therefore insufficient for the same reason as Statement 1.

When we combine the statements we have to be a bit careful. It may seem that now we have all four stages, but in fact the blue stage was mentioned twice, and nowhere do we have any information about the white stage.

There is no way to know the total distance of the race, and the answer is (E).
User avatar
minwoswoh
Joined: 10 May 2014
Last visit: 17 Nov 2021
Posts: 115
Own Kudos:
Given Kudos: 28
Posts: 115
Kudos: 366
Kudos
Add Kudos
Bookmarks
Bookmark this Post
To get the average speed you need to know (Db + Dy + Dr + Dw) / 2h 45m.

(1) Dr + Db = 55. Insufficient.
(2) Db + Dy = 42. Insufficient.

(1) and (2) Insufficient. We cannot know about Db + Dy + Dr + Dw
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 37,406
Own Kudos:
Posts: 37,406
Kudos: 1,013
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Moderator:
Math Expert
102576 posts