Dhaka Higher Secondary 2011/1

Problem for Higher Secondary Group from Divisional Mathematical Olympiad will be solved here.
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Please don't post problems (by starting a topic) in the "Higher Secondary: Solved" forum. This forum is only for showcasing the problems for the convenience of the users. You can post the problems in the main Divisional Math Olympiad forum. Later we shall move that topic with proper formatting, and post in the resource section.
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Eesha
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Dhaka Higher Secondary 2011/1

Unread post by Eesha » Wed Jan 11, 2012 10:01 am

In a box there are 50 gold rings of 10 different sizes and 75 silver rings of 12
different sizes. The size of a gold ring might be the same as that of a silver ring.
What is the minimum number of rings one need to pick up to be sure of having at
least two rings different both in size and material?

এটার উত্তর কেন ৭৬টা না???

কারণ ৭৫টা তুললে তার ৭৫টাই রুপার হউয়া সম্ভব...
গণিত অলেম্পিয়াডে প্রাইজ পাওয়াটাই আসল না। প্রাইজ সবসময় পায়না এমন অনেকেও অনেক ভাল।

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Eesha
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Re: Dhaka Higher Secondary 2011/1

Unread post by Eesha » Wed Jan 11, 2012 10:04 am

এইটার উত্তরতো আরও বেশী(৭৬+) হওয়ার কথা।
গণিত অলেম্পিয়াডে প্রাইজ পাওয়াটাই আসল না। প্রাইজ সবসময় পায়না এমন অনেকেও অনেক ভাল।

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Tahmid Hasan
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Re: Dhaka Higher Secondary 2011/1

Unread post by Tahmid Hasan » Wed Jan 11, 2012 12:57 pm

এইটা আগেও পোস্ট হয়েছে,
যাই হউক উত্তর $41+64+1=106$
বড় ভালবাসি তোমায়,মা

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Moon
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Re: Dhaka Higher Secondary 2011/1

Unread post by Moon » Wed Jan 11, 2012 3:21 pm

Try to search before posting: viewtopic.php?f=41&t=472
Also most of the divisional problems are nicely categorized in those sub forums: viewforum.php?f=41
"Inspiration is needed in geometry, just as much as in poetry." -- Aleksandr Pushkin

Please install LaTeX fonts in your PC for better looking equations,
learn how to write equations, and don't forget to read Forum Guide and Rules.

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