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Digits 1-7 (Posted on 2009-03-30) Difficulty: 2 of 5
A seven digit positive octal integer X is constituted by arranging the nonzero octal digits 1-7 in some order, so that:
  • The octal number formed by the first two digits is divisible by 2.
  • The octal number formed by the first three digits is divisible by 3.
  • The octal number formed by the first four digits is divisible by 4.
  • and, so on up to seven digits...
Determine all possible value(s) that X can assume.

No Solution Yet Submitted by K Sengupta    
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re(2): computer solution Comment 6 of 6 |
(In reply to re: computer solution by Stephanie)

I can understand your glee at find Charlie in error, but it seems that when he errs its something "minor" (if an error can be minor) within a carefully thoughtout process.

Our usual understanding here is to read numbers from left to right but it's good to see a different line of thinking, and for that matter, Charlie to accommodate it.

  Posted by brianjn on 2009-03-31 02:05:19

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