[Archive!] Pure mathematics, physics, chemistry, etc.: brain-training problems not related to trade in any way - page 266

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The correct answer is 1. Why ?
Mischek, всю малину испортил. Так хотелось полюбоваться, как народ мучается... Эхх...
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The handyman must have read it and the rest of us are asleep.)
No, I didn't have time (
такой ответ засчитывается? :-)
Actually, it doesn't count for ordinary people. But for you, Igor, as an exception, you will still find a way to optimise it somehow.
What do you mean?
The answer is unequivocal: it's enough to take one ball out, one time. You just have to know from which box.
Чтобы узнать, какие шары лежат в каждой из трех коробок, разрешается вынимать по одному шару из коробки и, не заглядывая внутрь, возвращать его обратно. Какое минимальное число шаров нужно вынуть, чтобы с уверенностью определить содержимое всех коробок?
That way they can all be re-excavated )
But the question is to find the minimum that is sufficient to solve the problem.