It's not true.
It mentions them both being 15 in the solution. But to solve it for myself I figured them as 10 and 20, and the answer worked, and they also together form 15 when split.).
Sam: "We're 98% certain General Skun-ka'pe is evil."
Stinky: "And the other 2%?"
Max: "That he's crazy and we have to shoot him! But that may be wishful thinking on our part."
(Any resemblance to KOTOR is purely coincidential, really!)