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Mathematics, 22.04.2020 19:47 Lexi5170

On an island there are 7 cities. Each two of them connected by a direct road. How many roads are there?


On an island there are 7 cities. Each two of them connected by a direct road. How many roads are the

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On an island there are 7 cities. Each two of them connected by a direct road. How many roads are the...
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