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Choose the alternative that will complete the series.
Q. 13, 31, 63, 127, 255, …….
  • a)
    513
  • b)
    511
  • c)
    517
  • d)
    523
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Choose the alternative that will complete the series.Q. 13, 31, 63, 12...
Each number is double the preceding one plus 1.
So, the next number is (255 x 2) + 1 = 511.
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Choose the alternative that will complete the series.Q. 13, 31, 63, 127, 255, …….a)513b)511c)517d)523Correct answer is option 'B'. Can you explain this answer?
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