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How would you bet? (Posted on 2011-02-13 )

What is the probability that a randomly chosen three-digit number (000 to 999 inclusive)
is eligible to appear at the end of a seventh power of an integer?

Submitted by Ady TZIDON
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Solution:
(Hide )
The probability is 0.505.
Charlie provided a complete listing, with a compilation of what numbers causes a given "tail".

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