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Just 3 digits (Posted on 2018-05-17) Difficulty: 4 of 5
A 10-digit number 2404563210 has an interesting feature: reading from left to right - any k-digit string is divisible by k.
No big deal ! IMHO there are 2492 numbers like that.

At least one of them utilizes only 3 distinct digits.

Find this number.

See The Solution Submitted by Ady TZIDON    
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Comments: ( You must be logged in to post comments.)
  Subject Author Date
re: interesting asideCharlie2018-05-18 13:58:44
interesting asideCharlie2018-05-18 10:18:57
computer solutionCharlie2018-05-17 12:32:17
I came up withFrankM2018-05-17 12:26:09
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