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800Score Test

by sourabh33 » Wed May 25, 2011 9:19 pm
T is the set of all numbers that can be written as a sum involving distinct real numbers a,b,c and d:
|a|a + 2|b|b + 3|c|c + 4|d|d + 5|abcd|abcd. what is the range of T?

A. 15
B. 20
C. 28
D. 29
E. 30

Another weird one from 800score. Can anyone please provide a true feedback on the these 800score tests?
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by vineeshp » Wed May 25, 2011 9:42 pm
Looks too long to be solved for a GMAT exam.

We have to consider all cases of positive and negative values for a to d.

The max value will be when all 4 are positive.
Least will be when a is positive and all others are negative.
Vineesh,
Just telling you what I know and think. I am not the expert. :)
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