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Delicate Divisibility (Posted on 2010-10-19) Difficulty: 3 of 5
For a positive base ten integer of the form ABCD drawn at random between 1111 and 9999 inclusively, determine the probability that ABCD is divisible by each of AB, AC, AD, BD and CD; but, not divisible by BC.

Note: Each of the letters in bold represents a digit from 1 to 9, whether same or different.

No Solution Yet Submitted by K Sengupta    
Rating: 4.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re(3): ABACADABrA (Solution) | Comment 6 of 7 |
(In reply to re(2): ABACADABrA (Solution) by ed bottemiller)

No I meant what I posted it was just a silly mistake on my part.  I realized it only when I thought about it while driving around this evening.
  Posted by Jer on 2010-10-20 01:30:59

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