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 Hill Numbers Settlement II (Posted on 2011-03-09)
A 7-digit base ten positive integer of the form ABCDEFG is called a modified hill number if the digits B, D and F satisfies: B = A + C (mod 10) , D = C + E (mod 10) and F= E + G (mod 10) (Each of the capital letters in bold denotes a digit from 0 to 9, whether same or different.)

Determine the probability that x is a modified hill number, given that x is a base ten positive integer chosen at random between 1000000 and 9999999 inclusively.

 No Solution Yet Submitted by K Sengupta No Rating

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 Subject Author Date re(2): answer Dej Mar 2011-03-11 17:53:06 re: answer Charlie 2011-03-10 11:48:35 answer Dej Mar 2011-03-10 04:46:58 solution Charlie 2011-03-09 15:10:32 possible solution Jer 2011-03-09 14:58:17
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