there are two solutions, one is one the negative side of the number line

i think you're losing many points with the last questions you've to guess. before starding quant for example, i write down the following on my scrap paper (thanks to mgmat): 60 - 8 45 - 15 30 - 23 15 - 31 this means, if i've 60 minutes left, i should be on question 8 or fast. if i've 45 minutes left...

GMAT Prep: Geometry

If a and b are both positive numbers, what are the coordinates of the midpoint of the line segment CD in the xy-plane?

(1) The coordinates of C are (a, 1-b).
(2) The coordinates of D are (1-a, b).

(1) x-y=0.5 if x is positive and greater 0.5, y has to be positive too if x is positive and 0.5, y has to be zero if x is positive but less 0.5, y has to be negative if x is zero or less, y has to be negative NOT sufficient (2) x/y>1 either x and y are both positive or negative NOT sufficient (1) an...

kevincanspain wrote:Nice! You might as well use the quadratic formula.

is it e?

2x-3y < -6

if x is positive and y is negative, there is no chance for fulfill the inequality (lowest result in this case is near -1). so +x-y quadrant can't contain such a point (E)

1) not suff
2) not suff
= a, b, d eliminated

r=s=t=1 => rst = 1
r= 1/3, s = 3, t = 1/3 => rst = 1/3

so: e