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.
Jun 0210:00 AM PDT
-11:00 AM PDT
Probability is one of the most important GMAT Quant topics because it often combines logic, counting, set theory, and permutations & combinations. Many students try to solve probability questions by listing every possible case, but GMAT probability...
Jun 0312:30 AM EDT
-01:30 AM EDT
Learn how Kamakshi achieved a GMAT 675 with an impressive 96th %ile in Data Insights. Discover the unique methods and exam strategies that helped her excel in DI along with other sections for a balanced and high score.
May 2910:00 AM IST
-11:00 PM IST
Start your journey with a fully customized action plan and work with a dedicated mentor to achieve a 735+ score.- Jun 03
08:30 AM PDT
-09:30 AM PDT
In Episode 7 of our GMAT Ninja CR series, we are rounding up the oddballs, the misfits, and the format-benders: EXCEPT, Fill-In-The-Blanks, and other unusual Critical Reasoning question types. When you see a question that ends with a literal blank line 
Jun 0401:00 AM EDT
-02:00 AM EDT
Learn how Keshav, a Chartered Accountant, scored an impressive 705 on GMAT in just 30 days with GMATWhiz's expert guidance. In this video, he shares preparation tips and strategies that worked for him, including the mock, time management, and more.- Jun 04
08:30 AM PDT
-09:30 AM PDT
For most test takers, Data Insights is the most challenging section on the GMAT, with test takers scoring several points lower on average on DI than on Quant or Verbal and completing the section with less time to spare. 
Jun 0803:00 PM PDT
-04:00 PM PDT
15 Full-length GMAT FE mocks with insightful analytics, weakness diagnosis, and video explanations!- 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..
19 May 2020, 06:08
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
69% (02:37) correct
31%
(02:04)
wrong
based on 99
sessions
History
Date
Time
Result
Not Attempted Yet
If a = 3.78xy7 and b = 1.37486, where x and y are positive digits, what is the value of a + b?
(1) If a and b are rounded to nearest thousandths digit, then a + b = 5.162
(2) If a and b are rounded to nearest ten-thousandths digit, then a + b = 5.1622
Are You Up For the Challenge: 700 Level Questions
(1) If a and b are rounded to nearest thousandths digit, then a + b = 5.162
(2) If a and b are rounded to nearest ten-thousandths digit, then a + b = 5.1622
Are You Up For the Challenge: 700 Level Questions
19 May 2020, 06:58
Kudos
Bookmarks
Bunuel
Solution
Step 1: Analyse Question Stem
- • \(a = 3.78xy7\)
• \(b = 1.37486\)
• \(0 < x ≤ 9\)
• \(0 < y ≤ 9\)
• We need to find the value of a + b
- o We can find exact value of a + b only if we know x and y.
Step 2: Analyse Statements Independently (And eliminate options) – AD/BCE
Statement 1: If a and b are rounded to nearest thousandths digit, then a + b = 5.162
- • b rounded to its thousandths place \(= 1.375\)
• Thus, a rounded to its thousandths place \(= 5.162 - 1.375 = 3.787\)
• Since, a is rounded to it’s thousandths place, so there can be two cases as given below:
- o Case 1 : If \(y < 5\), then \(a = 3.78x = 3.787 ⟹ x = 7\)
o Case 2: If \(y ≥ 5\), then then \(a = 3.78(x+1) = 3.787 ⟹ x = 6\)
Statement 2: If a and b are rounded to nearest ten-thousandths digit, then a + b = 5.1622
- • b rounded to its ten-thousandths place = 1.3749
• Thus, a rounded to its ten-thousandths place = 3.78x(y+1) = 5.1622 - 1.3749 = 3.7873
- o This means, \(x = 7\) and \(y = 2\)
Thus, the correct answer is Option B.
21 May 2020, 21:02
Kudos
Bookmarks
This one is not as straight-forward as it seems. See the attachment.
Attachments
1.PNG [ 28.39 KiB | Viewed 2163 times ]
