C it is.
Coord Geo
The midpoint formula was a good piece of info to use further. I went with the approach that if we know both the points then the distance of the line can be calculated and hence the midpoint co-ordinates.
C it is.
C it is.
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There are no shortcuts to any place worth going.
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Forget conventional ways of solving math questions. In DS, Variable approach is the easiest and quickest way to find the answer without actually solving the problem. Remember equal number of variables and equations ensures a solution.
If r and s are positive numbers, what are the coordinates of the
midpoint of line segment MN in the xy-plane?
(1) The coordinates of M are (r; 3 - s).
(2) The coordinates of N are (3 - r; s).
In the original condition there are 2 variables (r,s) thus we need 2 equations to match the number of variables and equations. Since there is 1 each in 1) and 2), C is likely the answer. In actual calculation,
Using both 1) & 2) together, we have ((r+3-r)/2,(3-s+s)/2)=(3/2,3/2) thus the answer is unique. Therefore C is the answer.
If you know our own innovative logics to find the answer, you don't need to actually solve the problem.
www.mathrevolution.com
- The one-and-only World's First Variable Approach for DS and IVY Approach for PS that allow anyone to easily solve GMAT math questions.
- The easy-to-use solutions. Math skills are totally irrelevant. Forget conventional ways of solving math questions.
- The most effective time management for GMAT math to date allowing you to solve 37 questions with 10 minutes to spare
- Hitting a score of 45 is very easy and points and 49-51 is also doable.
- Unlimited Access to over 120 free video lessons at https://www.mathrevolution.com/gmat/lesson
- Our advertising video at https://www.youtube.com/watch?v=R_Fki3_2vO8
If r and s are positive numbers, what are the coordinates of the
midpoint of line segment MN in the xy-plane?
(1) The coordinates of M are (r; 3 - s).
(2) The coordinates of N are (3 - r; s).
In the original condition there are 2 variables (r,s) thus we need 2 equations to match the number of variables and equations. Since there is 1 each in 1) and 2), C is likely the answer. In actual calculation,
Using both 1) & 2) together, we have ((r+3-r)/2,(3-s+s)/2)=(3/2,3/2) thus the answer is unique. Therefore C is the answer.
If you know our own innovative logics to find the answer, you don't need to actually solve the problem.
www.mathrevolution.com
- The one-and-only World's First Variable Approach for DS and IVY Approach for PS that allow anyone to easily solve GMAT math questions.
- The easy-to-use solutions. Math skills are totally irrelevant. Forget conventional ways of solving math questions.
- The most effective time management for GMAT math to date allowing you to solve 37 questions with 10 minutes to spare
- Hitting a score of 45 is very easy and points and 49-51 is also doable.
- Unlimited Access to over 120 free video lessons at https://www.mathrevolution.com/gmat/lesson
- Our advertising video at https://www.youtube.com/watch?v=R_Fki3_2vO8
