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.
Aug 1901:00 PM PDT
-02:00 PM 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.- Aug 11
12:00 PM PDT
-01:00 PM PDT
- Know exactly what to study, every day - Built by the GMAT Club community - 100% free, no sign-up needed - Aug 18
08:30 AM PDT
-09:30 AM PDT
Strong applicants do not always write strong MBA essays. In this session, we break down 5 common MBA essay mistakes that can quietly weaken an otherwise competitive application. - Aug 18
10:00 AM PDT
-11:00 AM PDT
Is GMAT Quant really a math test? Many test takers approach GMAT Quant with one of two beliefs: either “I’m not a math person, so I’ll struggle,” or “I’m good at math, so Quant should be easy.” But the GMAT often surprises both groups. - Aug 18
10:00 AM PDT
-11:00 AM PDT
In this episode of the GMAT Ninja Podcast, Charles and Brian Prestia bring six of the wildest GMAT improvement stories they’ve seen across decades of teaching. - Aug 20
10:00 AM PDT
-11:00 AM PDT
Solve GRE practice problems covering Quantitative reasoning, Verbal Reasoning, Text Completion, Sentence Equivalence, and Reading Comprehension Problems. Take this GRE practice quiz live with peers, analyze your GRE study progress 
Aug 2210:00 AM EDT
-01:00 PM EDT
Elite scores are possible when you enroll in a powerful GMAT course, taught live online + 6 months access to TTP OnDemand video courses included! Class starts Saturdays August 22, 2026 - Nov. 14, 2026, 10:00am-1:00pm EST
Aug 2211:00 AM EDT
-12:00 PM EDT
Top Scores Start with a Elite Online Prep Course. Enroll for 6 months of access to over 400 hours of GMAT video lessons AND 715+ Score Guarantee!
Aug 2507:00 PM EDT
-08:00 PM EDT
Stuck at the same GMAT score no matter how much you study? The secret to higher scores isn't doing more practice problems, it's knowing how to read your practice test data.
14 Jul 2026, 07:34
Kudos
Bookmarks
unique mode: x cannot be 6, 18, 21 because then mode wuldn't be unique. If x is only once, mode is the number already repeated 27.
test values of x to find the median:
+ if x is 17 or less, median = (18+21)/2 that is not an integer
+ if x is 19, median = (19+21)/2 = 20 that is not a multiple of 3
+ if x is 23, median = (23+27)/2 = 25 that is not a multiple of 3
+ if x is 27 or more, median = (21+27)/2 = 24 that is a multiple of 3
median = 24 and mode = 27
average can be 21 or 30
average = (6+18+21+27+27+x)/6 = (99+x)/6 = 21
x = 27
average = (99+x)/6 = 30
x = 81
range in (27, 81) is 81-27=54
The correct answer is B
test values of x to find the median:
+ if x is 17 or less, median = (18+21)/2 that is not an integer
+ if x is 19, median = (19+21)/2 = 20 that is not a multiple of 3
+ if x is 23, median = (23+27)/2 = 25 that is not a multiple of 3
+ if x is 27 or more, median = (21+27)/2 = 24 that is a multiple of 3
median = 24 and mode = 27
average can be 21 or 30
average = (6+18+21+27+27+x)/6 = (99+x)/6 = 21
x = 27
average = (99+x)/6 = 30
x = 81
range in (27, 81) is 81-27=54
The correct answer is B
14 Jul 2026, 07:45
Kudos
Bookmarks
Unique mode is 27, until any other number repeats itself.
Looking at the median now:
6,18,21,27,27, x
21+27/2 = 24
Condition to be a multiple of 3 satisfies for both 27 and 24.
Now solve for x: Catch is consecutive multiples
therefore either 21,24 and 27
or 24,27 and 30
now mean = sum of all observations/6 and equate to 21 and 30 one by one. We get two values 27 and 81 respectively. 81-27=54
Looking at the median now:
6,18,21,27,27, x
21+27/2 = 24
Condition to be a multiple of 3 satisfies for both 27 and 24.
Now solve for x: Catch is consecutive multiples
therefore either 21,24 and 27
or 24,27 and 30
now mean = sum of all observations/6 and equate to 21 and 30 one by one. We get two values 27 and 81 respectively. 81-27=54
14 Jul 2026, 07:52
Kudos
Bookmarks
Bunuel
Since the mode is unique, it must be 27. As mean, median and mode are consecutive multiples of 3, there could be only two possible cases: 21,24,27 or 24,27,30.
If mean is 21, then 99 + x = 126 which implies x = 27.
If mean is 30, then 99 + x = 180 which implies x = 81.
Therefore, range of all possible values = 81 - 27 = 54.
