BdMO National Secondary 2010#7

Discussion on Bangladesh Mathematical Olympiad (BdMO) National
samiul_samin
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BdMO National Secondary 2010#7

Unread post by samiul_samin » Fri Feb 22, 2019 11:04 pm

Replace each asterick with proof in six digit number $13**45*$ by different digits such that the resulting number is divisible by $792$.

samiul_samin
Posts:1007
Joined:Sat Dec 09, 2017 1:32 pm

Re: BdMO National Secondary 2010#7

Unread post by samiul_samin » Fri Feb 22, 2019 11:42 pm

$792=8×9×11$
So,this number must be divided by $8,9,11$.
Using brute force method, my answer is $\fbox {13724568}$
(This brute force is not a long term task.)

samiul_samin
Posts:1007
Joined:Sat Dec 09, 2017 1:32 pm

Re: BdMO National Secondary 2010#7

Unread post by samiul_samin » Tue Feb 26, 2019 9:15 am

samiul_samin wrote:
Fri Feb 22, 2019 11:04 pm
Replace each asterick with proof in six digit number $13**45*$ by different digits such that the resulting number is divisible by $792$.
This is Croatia National Olympiad $2005$ Problem no $1$.

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