Re: Math problem: help

[Le Minh Trung <trung@ait.ac.th>]

          My son has a math problem, which I can not figure
  out yet, and I would be grateful for your help. The problem
  is:

  "Find the largest seven-digit number (say X), where X is
  divisible to every digit. Note that the seven digits are
  unique (no repetition.)"

          Thank you in advance for your help.

          Tuan

  Hi Tuan,
If the problem is: "Find the largest seven-digit number containing
different digits and is divisible to every digit (except 0, (:-))",
I confirm the second Hong'solution is correct, i.e. 9843120.
Prove: every seven-digit number bigger than 9843120 does not have the 2
properties above (:-))
Cheers,
--
Le Minh Trung
Asian Institute of Technology, STAR Program
P.O. Box 4 KlongLuang, Pathumthani 12120, Thailand
Internet: http://www.rsl.ait.ac.th/~trung/
Tel. (662) 524 5585 Fax. (662) 524 6147