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Medium level - negative integers

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by truplayer256 » Thu Mar 05, 2009 3:11 pm
I would go with C. Two negative numbers added together produce a number that's less than zero. Since ab+cdef<0, we can assume that either a or b is negative and that three of the letters in cdef are negative, since a negative cubed is always negative.
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by Brent@GMATPrepNow » Thu Mar 05, 2009 3:23 pm
Actually, the answer is D (although I think that many will choose C)
Here's my solution:

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