Mymensingh higher secondary 2015 #4
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Please don't post problems (by starting a topic) in the "X: Solved" forums. Those forums are only for showcasing the problems for the convenience of the users. You can always 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.
Please don't post problems (by starting a topic) in the "X: Solved" forums. Those forums are only for showcasing the problems for the convenience of the users. You can always 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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In a bank there are $1000$ vaults. Of them first one is open, next two are closed, next three are open, and next four are closed, and so on… Total how many vaults are open then?
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- Posts:1007
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Re: Mymensingh higher secondary 2015 #4
Hint
Answer