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You are here: Home / Official GMAT Guides / 2018 Official GMAT Guide /

Question 219 Problem Solving 2018 GMAT Official Guide

Question 219 Problem Solving 2018 GMAT Official Guide

 
Video explanation: If a two-digit positive integer has its digit reversed, the…

Comments

  1. Saransh Saxena says

    September 25, 2020 at 4:14 AM

    Can’t we solve it like this
    96-69=27 and the difference between the digits will be 9-6=3.

    Reply
    • GMAT Quantum says

      September 25, 2020 at 8:31 AM

      Yes, absolutely, if you can come up with an example that satisfies all of the conditions in the question, then that can be used to identify the correct answer in case of a problem solving question. Of course it is not easy to come up with an example in all cases because this method relies on trial and error, but yes this approach will work.

      Also, keep in mind that a there may be cases where resorting to examples may not work or could be exceedingly difficult.

      Reply
    • GMAT Quantum says

      September 25, 2020 at 8:37 AM

      Here is an example of a problem that might be difficult to do by trial and error using the answer choices. This might even be too difficult for the GMAT, but if you can handle a problem like this then you are close to the Q51 target.

      Reply

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