In the x-y plane, the area of the region bounded by the graph of |x+y| + |x-y| = 8 is  Choose the correct choice from the following answers:  A) 8  B) 12  C) 256  D) 20  E) 24
I've never seen such kind of question in GMAT before.   OK there can be 4 cases:   |x+y| + |x-y| = 8   A. x+y+x-y = 8 --&gt; x=4   B. x+y-x+y = 8 --&gt; y=4   C. -x-y +x-y= 8 --&gt; y=-4   D. -x-y-x+y=8 --&gt; x=-4   The area bounded by 4 graphs x=4, x=-4, y=4, y=-4 will be square with the side of 4 so the area will be 16*16= 
<gadget id="calculator">16*16</gadget>
<output>256</output>
256   Answer: 256
<result>C</result>
In the x-y plane, the area of the region bounded by the graph of |x+y| + |x-y| = 8 is