THE QUESTION ASKS ABOUT THE SIGN OF D. (1) INSUFFICIENT

28. The question asks about the sign of d.

(1) INSUFFICIENT: When two numbers sum to a negative value, we

have two possibilities:

Possibility A: Both values are negative (e.g., e = -4 and d = -8)

Possibility B: One value is negative and the other is positive.(e.g., e

= -15 and d = 3).

(2) INSUFFICIENT: When the difference of two numbers produces

a negative value, we have three possibilities:

Possibility A: Both values are negative (e.g., e = -20 and d = -3)

Possibility B: One value is negative and the other is positive (e.g., e

= -20 and d = 3).

Possibility C: Both values are positive (e.g., e = 20 and d = 30)

(1) AND (2) SUFFICIENT: When d is ADDED to e, the result (-12) is

greater than when d is SUBTRACTED from e. This is only possible if

d is a positive value. If d were a negative value than adding d to a

number would produce a smaller value than subtracting d from that

number (since a double negative produces a positive). You can test

numbers to see that d must be positive and so we can definitively

answer the question using both statements.