If x and y are two points on the number line what is the

[BTGmoderatorDC]

If x and y are two points on the number line what is the value of x + y?

(1) 6 is halfway between x and y

(2) y = 2x

OA A

Source: GMAT Prep

[Jay@ManhattanReview]

If x and y are two points on the number line what is the value of x + y?

(1) 6 is halfway between x and y

(2) y = 2x

OA A

Source: GMAT Prep

Question: What is the value of x + y?

Let's take each statement one by one.

(1) 6 is halfway between x and y.

=> 6 is the arithmetic mean of x and y. Thus, (x + y)/2 = 6 => x + y = 12. Sufficient.

(2) y = 2x.

Certainly insufficient.

The correct answer: A

Hope this helps!

-Jay
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