blank subject lines

[Jon Awbrey]

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murty,

i recognized your name this time, but you may want to note that many
automated spam filters, along with the automated motor routines of
human fingers, have gotten in the habit of rejecting messages
with blank subject lines these days.

best regards,

jon awbrey

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murthy amarnath wrote:
> 
> Dear all,
> kindly look into this.
> Is the following conjecture true?
> (1): 3^r  divides  (10^k -1)/9   iff  3^r divides k.
> (I verified  it to be true for  r = 1,2,3 and  4.)
> 
> Similarly
>  (2): 11^r  divides  {10^(2k) -1}/9   iff  11^r
> divides k.
>   (3): 7^r  divides  {10^(6k) -1}/9   iff
> 7^(r-1)divides k.
> 
> thanks
> regards
> amarnath murthy

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