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Ricky has a magic money box. 
Every day the box doubles the number of coins placed inside of it. 
Ricky put in 3 pennies on Monday. 
He looked inside his box on Friday.
How many pennies did Ricky see?

 Dec 30, 2021
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3  *   2 * 2 * 2 * 2

3 * 24 = 48 coins on Friday

 Dec 30, 2021

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