Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
May 1810:00 AM PDT
-11:00 AM PDT
Join us in a live GMAT practice session and solve 25 challenging GMAT questions with other test takers in timed conditions, covering GMAT Quant, Data Sufficiency, Data Insights, Reading Comprehension, and Critical Reasoning questions.
May 1212:00 PM EDT
-11:59 PM EDT
Make the most of your break with the most realistic GMAT™ prep. Take up to $700 off select products. Ends 6/1
May 1501:00 PM IST
-11:00 AM IST
Start your journey with a fully customized action plan and work with a dedicated mentor to achieve a 735+ score.- May 19
12:00 PM PDT
-01:00 PM PDT
Scoring 329 on the GRE is not always about using more books, more courses, or a longer study plan. In this episode of GRE Success Talks, Ashutosh shares his GRE preparation strategy, study plan, and test-day experience, explaining how he kept his prep.... - Jun 10
06:00 AM PDT
-06:15 PM PDT
Register for the GMAT Club Virtual MBA Spotlight Fair – the world’s premier event for serious MBA candidates. This is your chance to hear directly from Admissions Directors at nearly every Top 30 MBA program..
10 Aug 2023, 05:00
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
78% (01:40) correct
22%
(01:52)
wrong
based on 823
sessions
History
Date
Time
Result
Not Attempted Yet
Each dinner at Restaurant X includes a pair of side dishes, which a customer chooses by selecting any one side dish from list A and any one side dish from list B. There are a total of 18 possible pairs of side dishes, and no side dish appears on both lists. If there are fewer side dishes on list A than on list B, how many side dishes are on list B ?
(1) There are a total of 9 side dishes on the two lists.
(2) There are a total of 3 side dishes on list A.
(1) There are a total of 9 side dishes on the two lists.
(2) There are a total of 3 side dishes on list A.
Trying to understand why the right answer is right?
GMAT Club Tests explanations walk through concepts, shortcuts, and common traps on many questions.
See how →
10 Aug 2023, 12:37
Kudos
Bookmarks
Bunuel
Number of side dishes in List A = x
Number of sides dishes in List B = y
Quote:
x * y = 18
Possible combinations of (x,y) =
(1,18)
(2,9)
(3,6)
(6,3)
(18,1)
Quote:
We have to remove the possibility of (6,3) and (18,1).
Possible combinations of (x,y) =
(1,18)
(2,9)
(3,6)
(6,3)
(18,1)
Statement 1
(1) There are a total of 9 side dishes on the two lists.
Out of the three possible pairs indicated in green, the only possible pair of (x,y) = (3,6).
Hence, we have a definite answer to the question, and statement 1 alone is sufficient. We can eliminate options B, C, and E.
Statement 2
(2) There are a total of 3 side dishes on list A.
The statement provides us with the value of \(x\).
\(x = 3.\)
Hence, \(y = 6.\)
\((x,y) = (3,6)\).
We have a definite answer to the question, and statement 2 alone is sufficient.
Option D
General Discussion
29 Aug 2023, 10:10
Kudos
Bookmarks
Bunuel
Since there is no overlap between the two lists, and since we need to select one item from each of the two lists to make a pair of side dishes, we have:
number of pairs = number of items on list A × number of items on list B = a × b
We know that ab = 18 and a < b and need to answer the question:
b = ?
Statement One Alone:
=> There are a total of 9 side dishes on the two lists.
a + b = 9
From the question stem we know that a and b are integers greater than 1 [because there must be more than 1 item on a list so that a customer has a choice], ab = 18, and a < b, so we have only two cases to evaluate:
If a = 2 and b = 9, then a + b ≠ 9, so this is an invalid case.
If a = 3 and b = 6, then a + b = 9, so this is the only valid case, and thus there are 6 side dishes on list B.
Statement one is sufficient. Eliminate answer choices B, C, and E.
Statement Two Alone:
=> There are a total of 3 side dishes on list A.
a = 3
From the question stem, we know that we have only two cases to evaluate:
If a = 2 and b = 9, then a ≠ 3, so this is an invalid case.
If a = 3 and b = 6, then a = 3, so this is the only valid case, and thus there are 6 side dishes on list B.
Statement two is sufficient.
Answer: D
