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.
Nov 2007:30 AM PST
-08:30 AM PST
Learn what truly sets the UC Riverside MBA apart and how it helps in your professional growth
Nov 2211:00 AM IST
-01:00 PM IST
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies Tackle difficult RC & MSR with confidence Excel in timed test environment- Nov 23
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. 
Nov 2510:00 AM EST
-11:00 AM EST
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.
08 Dec 2020, 10:05
Kudos
Bookmarks
Que: How many more boys than girls are in the class?
(1) There are a total of 10 boys and girls in the class.
(2) The number of boys in the class equals the cube of the number of girls in the class.
(1) There are a total of 10 boys and girls in the class.
(2) The number of boys in the class equals the cube of the number of girls in the class.
11 Dec 2020, 02:21
Kudos
Bookmarks
MathRevolution
Solution: To save time and improve accuracy on DS questions in GMAT, learn, and apply the Variable Approach.
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.
Visit https://www.mathrevolution.com/gmat/lesson for details.
Now we will solve this DS question using the Variable Approach.
Let’s apply the 3 steps suggested previously.
Follow the first step of the Variable Approach by modifying and rechecking the original condition and the question.
Let us assign variables: Boys (b) and Girls (g)
We have to find the value of b – g.
Follow the second and the third step: From the original condition, we have 2 variables (b and g). To match the number of variables with the number of equations, we need 2 equations. Since conditions (1) and (2) will provide 1 equation each, C would most likely be the answer.
Recall 3- Principles and Choose C as the most likely answer. Let’s look at both conditions together.
Condition (1) tells us that there are a total of 10 boys and girls in the class => b + g = 10
Condition (2) tells us that the number of boys in the class equals the cube of the number of girls in the class => b = \(g^3\)
=> b + g = 10
=> \(g^3\) + g = 10
=> g(\(g^2\) + 1) = 10
=> If g = 1: g(\(g^2\) + 1) = 1(\(1^2\) + 1) = 2 ≠10
=> If g = 2: g(\(g^2\) + 1) = 2(\(2^2\) + 1) = 10 = 10
Therefore g = 2 and b = \(g^3\) => b = \((2)^3\) => b = 8
=> b – g = 8 – 2 = 6
The answer is unique and both conditions combined together are sufficient according to Common Mistake Type 2 which states that the answer should be a unique value.
Both conditions combined together are sufficient.
Therefore, C is the correct answer.
Answer: C
11 Dec 2020, 02:40
Kudos
Bookmarks
Que: If |x + 3| = 2, what is the value of x?
(1) x < 0
(2) \(x^2 + 6x + 5 = 0\)
(1) x < 0
(2) \(x^2 + 6x + 5 = 0\)
