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| Terminating in seven sevens (Posted on 2009-06-26) |
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Determine the minimum value of a positive base ten integer N, such that each of the last seven digits of N3 is 7 but the eighth digit from the right in N3 is not 7.
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Submitted by K Sengupta
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Solution:
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The required minimum value of N is 9660753.
For an explanation, refer to the solution submitted by Charlie in this location.
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