Hi sagarag,

This is an example of "Symbolism" question. We're given a symbol, told what it represents mathematically, then asked to perform a calculation with it. Since we're not given any specific values to work with, we can TEST VALUES.

We're told that X# = X(X+3)

eg

2# = 2(2+3) = 10

We're asked for the value of X##.....notice the second symbol - this means that we have to perform TWO calculations using this Symbol (the RESULT of the first calculation gets put back into the Symbol to get us the second, final result).

IF...X = 2

2## = 2(2+3) = 10

10# = 10(10+3) = 130

So we're looking for an answer that = 130 when X = 2

While these answers look "crazy", notice what they ALL have in common....X(X+3)....We do NOT have to do THAT calculation 5 times; we just have to do it ONCE and plug the result into all 5 answers.

Answer A: 10 is NOT a match

Answer B: 10^2 = 100 is NOT a match

Answer C: 10(13) = 130 IS a MATCH

Answer D: 10(10) = 100 is NOT a match

Answer E: 10(14) = 140 is NOT a match

Final Answer:

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

Rich

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