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Math problem

Hello Thu Huong and Thanh Hong,

        You are very smart, that is the correct number (679). But, you have
not told us how did you arrive at the number! Please do.

        Cheers,

        Tuan V Nguyen

>On Tue, 18 Mar 1997, Thu-Huong Tran wrote:
>
>> The answer is N=679
>> 
>> TH
>> -----
>> 
>> >	Here is another problem for you: Find the smallest 
>> >integer number N, so that N! is divisible by 7^100 [e.g. 7 to 
>> >the power of 100].
>> >
>
>Hi Thu Huong,
>
>The number must be 609.
>
>Check it, OK!
>
>H