Moldy Bagel
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Finally, it was time to snack on a bagel. The math teacher removed her sandwich and remarked that the coating of mold had now completely covered the surface of the bread.It was June 30. The sandwich was first packed for a field trip on June 1. If the area occupied by the mold doubled everyday, on what day was the surface half covered with mold?
(Solution)
Puzzle by Michael DiSpezio.
More information is available about DiSpezio's books.
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