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| Successively incident (Posted on 2011-05-18) |
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All the base ten positive integers are written successively, without commas or spaces, resulting in this infinite string.
1234567891011121314......
Reading left to right, determine the digit following and the digit preceding the 2011th incidence of the digit 1. What is the digit following and the digit preceding the 20110th incidence of the digit 1?
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Submitted by K Sengupta
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Solution:
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(A) The digits following and preceding 2011th incidence of the digit 1 are respectively 7 and 3.
(B) The digits following and preceding 20110th incidence of the digit 1 are respectively 7 and 5.
For a detailed explanation, refer to the solution submitted by Jer in this location.
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