Intended for: November 12, 2012
Timetable
- First draft entered by Alonso del Arte on April 1, 2012 ✓
- Draft reviewed by Daniel Forgues on April 3, 2012 ✓
- Draft to be approved by October 12, 2012
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A158624: Upper limit of backward value (base
10) of
.
-
The “backward value (base
10)” of
25 is
0.52; of
125, 0.521; of
625, 0.526; of
3125, 0.5213; etc. Since
it follows that the backward value of
starts out
0.5. Furthermore, since
5 n ≡ 25 (mod 100), n ≥ 2, |
the next to least significant digit is
2 for all
, and the backward value therefore in those cases always starts out
0.52. It is a little harder to prove that any subsequent digit of this constant is either
5, 6, 7, 8 or
9 but not
0, 1, 2, 3 or
4.
See also:
A158625 Lower limit of backward value (base
10) of
.