Bunuel wrote:
If n is an integer between 3 and 9, what is the value of n ?
(1) On the number line, the distance from 3 to n is 2/3 of the distance from 3 to 9.
(2) On the number line, n is 10 units to the right of -3
Given: n is an integer between 3 and 9 In other words, the number line looks like This: <------3-----n------9------>
Target question: What is the value of n ? Statement 1: On the number line, the distance from 3 to n is 2/3 of the distance from 3 to 9. We can write: (n - 3) = (2/3)(9 - 3)
Since this is a linear equation with only one variable, we COULD to find the value of n (but we would never waste precious time on test day doing so)
Since we COULD answer the
target question with certainty, statement 1 is SUFFICIENT
Aside: If we solve the equation we get n = 7 Statement 2: On the number line, n is 10 units to the right of -3In other words, n = -3 + 10
In other words,
n = 7Since we can answer the
target question with certainty, statement 2 is SUFFICIENT
Answer: D
Cheers,
Brent
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Brent Hanneson – Creator of gmatprepnow.com
I’ve spent the last 20 years helping students overcome their difficulties with GMAT math, and the biggest thing I’ve learned is…
Many students fail to maximize their quant scores NOT because they lack the skills to solve certain questions but because they don’t understand what the GMAT is truly testing -
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