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

 Aug 13, 2023
 #1
avatar-1 
+1

The 19th day because 20 - 1 = 19. 

 Aug 13, 2023
 #3
avatar+758 
+1

Correct

history  Aug 13, 2023
 #2
avatar+175 
+3

On the 19th day

 Aug 13, 2023
 #4
avatar+758 
+1

Correct

history  Aug 13, 2023

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