Problem Solving (PS) | Re: If N = K/(T + x/y), where T = K/5 and x = 5 T which of the following

Hi TargetMBA007,

Most GMAT questions are written so that they can be approached in more than one way - so as an appraoch, TESTing VALUES works on lots of different questions. Obviously, there are certain questions that are strictly about doing Algebra/Arithmetic in terms how they're set up (meaning that the unknowns aren't really "variables", they're locked-in values that we don't know yet - and have to solve for). For example, a standard 2-variable, 2-equation 'system' question only has one solution (even though it includes 2 'variables') - and we'll almost always have to do Algebraic work to find that solution. In those situations, you could potentially TEST VALUES to 'narrow down' to what the solution would be, but that would not be an efficient way to answer the question.

Much of this comes down to your training and memory (about prior questions that you have worked through). You'll start to recognize when certain approaches
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Statistics : Posted by TargetMBA007 • on 21 Sep 2019, 04:11 • Replies 16 • Views 17613

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