Hi All,

As 'thick' as this question might look, it's actually a fairly straight-forward Rate question and can be solved by TESTing VALUES.

We're told that a computer can perform C calculations in S seconds.

Let's TEST....

C = 2

S = 3

2 calculations every 3 seconds =

40 calculations every 1 minute

We're asked how many MINUTES it will take to perform K calculations.

Since we already know that the computer can perform 40 calculations in 1 minute, let's TEST...

K = 80

So we're looking for an answer that = 2 when C = 2, S = 3 and K = 80

Answer A: 60KS/C = 60(80)(3)/2 = 7200 This is NOT a match

Answer B: KS/C = (80)(3)/2 = 120 This is NOT a match

Answer C: KS/60C = (80)(3)/(60)(2) = 2 This IS a match

Answer D: 60C/KS = 60(2)/(80)(3) = 1/2 This is NOT a match

Answer E: K/60CS = 80/(60)(2)(3) = a fraction. This is NOT a match

Final Answer:

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

Rich

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# Rich Cohen

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