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      Question

      (?)2 + 6.113 = 25.92

      – 19.03 What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)Β 
      A 31 Correct Answer Incorrect Answer
      B 12 Correct Answer Incorrect Answer
      C 21 Correct Answer Incorrect Answer
      D 16 Correct Answer Incorrect Answer
      E 27 Correct Answer Incorrect Answer

      Solution

      (?)2 + 63 = 262 – 19 (?)2 + 216 = 676 – 19 (?)2 = 657 – 216 (?)2 = 441 ? = 21

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