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.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2601:30 AM EDT
-02:30 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.
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
May 0111:00 AM PDT
-12:00 PM PDT
Free- full-length test + 15 concept videos + 150+ short videos + study plan!
11 Jun 2018, 02:05
Kudos
Bookmarks
B
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:
67% (01:01) correct
33%
(00:59)
wrong
based on 39
sessions
History
Date
Time
Result
Not Attempted Yet
The symbol \(⊙\) represents one of the operations: addition, subtraction, multiplication, and division. Is \(2⊙2=4？\)
1) \(1⊙1=1\)
2) \((-1) ⊙ (-1)=0\)
1) \(1⊙1=1\)
2) \((-1) ⊙ (-1)=0\)
11 Jun 2018, 02:05
Kudos
Bookmarks
Official Solution:
Forget conventional ways of solving math questions. For DS problems, the VA (Variable Approach) method is the quickest and easiest way to find the answer without actually solving the problem. Remember that equal numbers of variables and independent equations ensure a solution.
The first step of the VA (Variable Approach) method is to modify the original condition and the question, and then recheck the question.
Since only 2 + 2 = 4 and 2 * 2 = 4, the question asks if ⊙ is addition or multiplication.
Condition 1) Since 1 * 1 = 1 and 1 / 1 = 1, ⊙ is multiplication or division. Condition 1) is not sufficient.
Condition 2) Since (-1) - (-1) = 0, ⊙ is subtraction. The answer is "no". CMT1 states that "no" is also an answer. Condition 2) is sufficient.
Answer: B
Forget conventional ways of solving math questions. For DS problems, the VA (Variable Approach) method is the quickest and easiest way to find the answer without actually solving the problem. Remember that equal numbers of variables and independent equations ensure a solution.
The first step of the VA (Variable Approach) method is to modify the original condition and the question, and then recheck the question.
Since only 2 + 2 = 4 and 2 * 2 = 4, the question asks if ⊙ is addition or multiplication.
Condition 1) Since 1 * 1 = 1 and 1 / 1 = 1, ⊙ is multiplication or division. Condition 1) is not sufficient.
Condition 2) Since (-1) - (-1) = 0, ⊙ is subtraction. The answer is "no". CMT1 states that "no" is also an answer. Condition 2) is sufficient.
Answer: B
18 Jan 2019, 02:02
Kudos
Bookmarks
I think this is a high-quality question and I agree with explanation.
) 
