One out of 9 otherwise identical balls is overweight. How can it be identified after 2 weighings?

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What comes once in a minute, twice in a moment, but never in a thousand years?

Kids play it and Michelangelo sculpted with it.

I am too much for one but not enough for two. Give me to a third and I am gone. What am I?

What did zero say to eight?

I have 4 legs but never run. What am I?

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One out of 9 otherwise identical balls is overweight. How can it be identified after 2 weighings?

Answer: Weigh a group of 3 balls against another group of 3, then you'll know which group of 3 contains the heavy ball. Pick 2 balls from that group and weigh one against the other.

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Kids play it and Michelangelo sculpted with it.

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I am too much for one but not enough for two. Give me to a third and I am gone. What am I?

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