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      Question

      (?)2 + 3.113 = 22.92

      – 61.03  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.) 
      A 21 Correct Answer Incorrect Answer
      B 24 Correct Answer Incorrect Answer
      C 16 Correct Answer Incorrect Answer
      D 10 Correct Answer Incorrect Answer
      E 33 Correct Answer Incorrect Answer

      Solution

      (?)2 + 33 = 232 – 61 (?)2 + 27 = 529 – 61 (?)2 = 468 – 27 (?)2 = 441 ? = 21

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