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Date: Tue, 06 Jun 23 15:58:36 +0000
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From: Richard Hachel <r.hachel@tiscali.fr>
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Le 06/06/2023 à 08:58, robby a écrit :
> Le 06/06/2023 à 08:37, Jacques Mathon a écrit :
>> Je vois juste que X-10 doit diviser 10X
>> Ce qui est bien le cas pour 14 (ainsi que pour 11,12,15 et 20)
> 
> argh, oui.
> 
> bon, raisonnement amélioré:
> 
> posons i := X-10   → y = 10(i+10)/i = 10 + 100/i
> 100 = 2²5²  donc i = 1,2,4,5,10,20,25,50,100
> soit X = 11,12,14,15,20,30,35,60,110

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R.H.