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    • 5 March 2023 at 7:21 AM #31536
      Anurag RK
      Participant

      In this DS question
      Is n = 4?
      (1) 2n – 5 = 3
      (2) n^2 = 25
      why is the answer D? I think only A should be the answer.

    • 5 March 2023 at 7:46 AM #31537
      Anannya K
      Participant

      From (1), n is definitely equal to 4. So, (1) is sufficient.
      From (2), n is definitely NOT equal to 4. So, (2) is also sufficient to answer the question “is n=4?”
      So, D is the answer.
      Check the Data Sufficiency Basics videos. This question model is explained and also mentioned are the common mistakes students make when answering such questions.

    • 5 March 2023 at 11:51 AM #31538
      Anurag RK
      Participant

      oh ok. Understood. I reviewed the video too.
      I was making the mistake of trying to prove that n=4. I now know that the answer should be a definitely Yes or No.

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