BdMO National 2013: Primary 4

Discussion on Bangladesh Mathematical Olympiad (BdMO) National
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BdMO National 2013: Primary 4

Unread post by BdMO » Fri Jan 10, 2014 1:14 am

The English alphabets are arranged in $3$ rows in a Keyboard. Now somebody presses one key in the first row in such a way that there are same number of keys on both sides of that key in that row. Now a second person presses a key in the second row in the same way and a third person also does the same in the third row. Show that it is impossible.

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atiab jobayer
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Re: BdMO National 2013: Primary 4

Unread post by atiab jobayer » Thu Jan 30, 2014 11:10 pm

The patern of keyboard is 10:9:7.the term is when a word selected then there must be same number word beside 2side of row. So though the 2nd and 3rd row agree with this term but 1st don't . :twisted:
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