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      Question

      If we subtract 1 from all the even digits of the number

      2371624351, then, which digit(s) appear(s) more than twice after the rearrangement?
      A Only 7 and 3 Correct Answer Incorrect Answer
      B Only 3 and 1 Correct Answer Incorrect Answer
      C Only 5 and 7 Correct Answer Incorrect Answer
      D Only 9 and 7 Correct Answer Incorrect Answer

      Solution

      2 3 7 1 6 2 4 3 5 1

      1 3 7 1 5 1 3 3 5 1

      Digits that appear more than twice: 3 and 1.

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