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What will be the first digit of the second highest number after the positions of only the 2nd, 3rd digits within each number are interchanged?

  • A.8
  • B.2
  • C.7
  • D.9

Answer: C

Correct answer: 7

Interchanging the second and third digit of each number gives 571, 352, 693, 814 and 729. In order these run 814, 729, 693, 571, 352, so the second highest is 729 and its first digit is 7.

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