Hi Blackbox,

This question can absolutely be solved by TESTing VALUES. Here's how:

You can see from the answer choices that there are 5 variables, so you want to keep your values relatively simple. Before I TEST any values though, I'm going to take some quick notes on what the prompt tells us:

March:

X% commission on M players @ $P/player

April:

Y% commission on (M+Q) players @$P/player

We're told that Y > X and it's implied that all values are > 0.

Here are my VALUES:

X = 10 (percent)

Y = 50 (percent)

M = 1 (player)

Q = 2 (players

P = 10 (dollars)

Using these values, we get...

March:

10% of 1 player @$10/each = 10%($10) = $1

April:

50% of 3 players @$10/each = 50%($30) = $15

The DIFFERENCE = $14

Since the answer choices are suitably "crazy"-looking, we need to take advantage of any repeating patterns (such as P/100 = 10/100 = 1/10) and math "shortcuts" so we can avoid any unnecessary work.

Answer A: (1/10)[50 - 30] = $2 Not a match

Answer B: (1/10)[30 + 50] = $8 Not a match

Answer C: 10[-50 - 10] = NEGATIVE. Not a match

Answer D: (1/10)[30 - 50] = NEGATIVE. Not a match

Answer E: (1/10)[150 - 10] = $14 MATCH

Final Answer:

GMAT assassins aren't born, they're made,

Rich

_________________

Rich Cohen

Rich.C@empowergmat.com

http://www.empowergmat.com

EMPOWERgmat GMAT Club Page, Study Plans, & Discounts

http://gmatclub.com/blog/courses/empowergmat-discount/?fl=menu