He wanted his soil to be rich!
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A stick.
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Seven. One to install the new bulb and six to figure out what to do with the old one for the next 10,000 years.
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The owner got tired of the (w)hole business!
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They turn from notating nuclear spins to notating unclear puns.
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Five: One to change the bulb and four to pull the ladder out from under him/her.
or