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Here's a riddle guys

Algae grows on a lake and doubles in size every day. After 48 days it covers the entire lake. How many days did it take for it to cover just half the lake?
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MrAboo · 36-40, M
@MrAboo nope.Read this riddle in a book that used it as an example of how the mental short cuts we often take can lead us astray. Thought it was interesting 🤷‍♀️