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akhilsuhag
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GMATGuruNY
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The drawings below satisfy both statements:The points A, B, C, and D are on a number line, not necessarily in that order. If the distance between A and B is 18 and the distance between C and D is 8, what is the distance between B and D?
(1) The distance between C and A is the same as the distance between C and B.
(2) A is to the left of D on the number line.
Since in the first case BD=1 and in the second case BD=17, the two statements combined are insufficient.
The correct answer is E.
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Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at [email protected].
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ceilidh.erickson
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To add to Mitch's explanation...
When number lines are discussed on the GMAT, they are often testing properties of absolute value - in other words, we must think of both positive and negative cases. You cannot simply subtract to get a difference. It's best to draw the number line as Mitch did, and draw both the positive and negative possibilities for each statement.
When number lines are discussed on the GMAT, they are often testing properties of absolute value - in other words, we must think of both positive and negative cases. You cannot simply subtract to get a difference. It's best to draw the number line as Mitch did, and draw both the positive and negative possibilities for each statement.
Ceilidh Erickson
EdM in Mind, Brain, and Education
Harvard Graduate School of Education
EdM in Mind, Brain, and Education
Harvard Graduate School of Education
