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You have a total supply of $1000$ pieces of candy, and an empty vat.  You also have a machine that can add exactly $5$ pieces of candy per scoop to the vat, and another machine that can remove exactly $3$ pieces of candy with a different scoop from the vat.  When these two machines are done, there is only one piece of candy left in the vat.  What is the smallest possible number of times the the first machine added candy to the vat?

 
 Oct 31, 2024
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You have a total supply of $1000$ pieces of candy, and an empty vat.  You also have a machine that can add exactly $5$ pieces of candy per scoop to the vat, and another machine that can remove exactly $3$ pieces of candy with a different scoop from the vat.  When these two machines are done, there is only one piece of candy left in the vat.  What is the smallest possible number of times the the first machine added candy to the vat?    

 

Start the 1st machine and let it cycle 2 times ...  2 x 5 = 10 pieces added    

Start the 2nd machine and let it cycle 3 times ...  3 x 3 =   9 pieces removed    

                                                                                          1 piece remains in vat    

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 Oct 31, 2024

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