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      Question

      (?)2 + 6.113 = 27.92

      โ€“ 39.03ย  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.)ย 
      A 19 Correct Answer Incorrect Answer
      B 23 Correct Answer Incorrect Answer
      C 12 Correct Answer Incorrect Answer
      D 28 Correct Answer Incorrect Answer
      E 36 Correct Answer Incorrect Answer

      Solution

      (?)2 + 63 = 282 โ€“ 39 (?)2 + 216 = 784 โ€“ 39 (?)2 = 745 โ€“ 216 (?)2 = 529 ? = 23

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