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      Question

      If 54 [9] 3 and 108 [30] 5, then what is the value of Z

      in 19 [Z] 18?
      A 18 Correct Answer Incorrect Answer
      B 19 Correct Answer Incorrect Answer
      C 36 Correct Answer Incorrect Answer
      D 72 Correct Answer Incorrect Answer

      Solution

      The pattern is that the number in the middle is obtained by multiplying the numbers on each sides and then dividing the result by β€˜18’. Β  Hence, the correct answer is (B).

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