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Un article trouvé pour ce sujet.
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Collecting an army |
2009-02-25 |
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bevaz pose la question :
Question from bevaz, a student:
A ruler orders his chamberlain to collect an army from 30 houses. The servant goes to the first house alone and collects one man. At each house after that he takes the same number of men as he has already collected, so at the second house he goes with one other and so on. How many men did he collect in all?
Penny Nom lui répond. |
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