Posted by Anonymous on Friday, October 26, 2012 at 11:54am.
Using 10^n = x (mod 9).
Given that
d=2935107
=2*10^6 + 9*10^5 + 3*10^4 + 5*10^3 + 1*10^2 + 0*10^1 + 7^10^0
Then d = kx (mod 9).
What is the smallest positive value of k?

Math  Steve, Friday, October 26, 2012 at 2:36pm
well, there may be something missing here, but taking it as written,
since 10^n = 1 (mod 9)
d = 2+0+3+5+1+0+7 (mod 9) = 0 mod 9
k=9 would fit the bill, since k=0 is not positive.
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