Saturday 10 December 2005 at 8:32 pm | In Articles | 4 Comments

There was a nice little problem posted on S.O.S. Mathematics CyberBoard which comes from an International Mathematics Tournament of Towns question:

    The least common multiple of positive integers a,b,c and d is equal to a+b+c+d. Prove that the product abcd is divisible by at least one of 3 and 5.

If you need a hint you’ll find one on the AoPS Math Forum


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  1. hi
    we have a mathematics blog that contain mathematical activity in Iran. we publish it in English/French/Persian language. may we have your link ?
    please contact me

    Comment by esmailifar — Tuesday 20 December 2005 12:50 pm #

  2. You are welcome to link to this blog – do you have an English language webpage?

    Comment by Steve — Tuesday 20 December 2005 1:04 pm #

  3. How can I register a maths weblog?
    I really love this!

    Comment by Fish Huang — Monday 26 December 2005 5:31 am #

  4. You will need a host that either has \LaTeX installed on the server or will allow you to run a CGI program MimeTeX.
    If you use WordPress you can easily use the plugin at Using LaTeX in WordPress to enable you to show maths.

    Comment by Steve — Monday 26 December 2005 10:57 am #

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