Primary Divisonal 2012/1

Problem for Primary Group from Divisional Mathematical Olympiad will be solved here.
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Please don't post problems (by starting a topic) in the "Primary: 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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Phlembac Adib Hasan
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Primary Divisonal 2012/1

Unread post by Phlembac Adib Hasan » Thu Dec 11, 2014 12:53 pm

A mobile operator declared that it will provide a minute of free talktime for every $2$ minutes spent. If you want to talk a total of $7$ minutes, for how many minutes will you have to pay?
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Re: Primary Divisonal 2012/1

Unread post by tanmoy » Thu Dec 11, 2014 1:33 pm

$5$ minutes.
"Questions we can't answer are far better than answers we can't question"

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