| Lily is a lilypad in a small pond. Lilly doubles her size each day, On the 20th day she cover the whole pond.
On what day was Lily half the size of the pond? |
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| Lily is a lilypad in a small pond. Lilly doubles her size each day, On the 20th day she cover the whole pond.
On what day was Lily half the size of the pond? |
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