BdMO 2017 National Round Secondary 7

Discussion on Bangladesh Mathematical Olympiad (BdMO) National
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Tasnood
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Re: BdMO 2017 National Round Secondary 7

Unread post by Tasnood » Wed Mar 07, 2018 10:17 am

Told you before, if $20$ pictures can share more than two common color and not all of them share the same color, the answer is $2$.
[100% sure] :D

prottoy das
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Location: Sylhet

Re: BdMO 2017 National Round Secondary 7

Unread post by prottoy das » Tue Feb 19, 2019 10:29 pm

The problem is from Turkey Junior National math olympiad 2015,Q2!!! At least 3 of the problems of secondary category of nationa bdmo 2017 was stolen!!!
Last edited by prottoy das on Wed Feb 20, 2019 1:47 pm, edited 1 time in total.

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samiul_samin
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Re: BdMO 2017 National Round Secondary 7

Unread post by samiul_samin » Wed Feb 20, 2019 9:16 am

prottoy das wrote:
Tue Feb 19, 2019 10:29 pm
The problem is from Turkey Junior National math olympiad 2015,Q2!!! At least 3 of the roblems of secondary category of nationa bdmo 2017 was stolen!!!
Actually making this type of hard problems is too much tough and that's why problems are taken from those contests!It is happening from the very beginning of BdMO and you might get a common question @ National Olympiad $2019$ !

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samiul_samin
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Re: BdMO 2017 National Round Secondary 7

Unread post by samiul_samin » Fri Feb 22, 2019 7:09 pm

What is the correct answer ?
$20$ or $21$?

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