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Zero. The maching gives change in quarters and dimes not nickles.

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Q: A change machine gives change in quarters and dimes If you receive 12 coins after inserting a dollar bill how many nickels did you receive?
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A change machine changes dollar bills into quarters and nickels If you receive 12 coins after inserting a dollar bill how many quarters did you receive?

2 quarters.


If you receive 12 coins after inserting a dollar bill how many nickels did you receive?

One solution is 10 nickels, because if you put in a dollar it can be broken into: 2 quarters (50 cents) so 50 cents are left, and you have 10 coins left to use If these 10 coins are all nickels, (total: 50 cents), the problem is solved! .5 +.5 =1 dollar


A change machine gives change in quarters and dimes if you receive 12 coins after inserting a dollar bill how many quarters did you receive?

A dime = $0.10 A quarter = $0.25 You have received 12 coins as a mixture of dimes and quarters. The minimum value of those 12 coins is 12 of the smaller denomination coin, ie the 12 dimes: The sum of 12 dimes is 12 × $0.10 = $1.20 If you replace a dime by a quarter it will create a larger sum as: you remove $0.10 but add $0.25 giving a difference of -$0.10 + $0.25 = $0.15 → the change machine is clearly not working correctly. as the sum of the 12 coins must be at least $1.20 and you only inserted a dollar. ----------- However, if the machine gives change in quarters and nickels, then: a nickel = $0.05 a quarter = $0.25 12 nickels = 12 × $0.25 = $0.60 Every time a nickel is replaced by a quarter the effect is to subtract $0.05 and add $0.25 to make an overall difference of -$0.05 + $0.25 = $0.20 → increase the sum by $0.20 $1.00 - $0.60 = $0.40 $0.40 ÷ $0.20 = 2 → replace 2 nickels by quarters and the total value is $1.00 → 10 nickels + 2 quarters = 10 × $0.05 + 2 × $0.25 = $0.50 + $0.50 = $1.00 The machine gave you 10 nickels and 2 quarters.


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What is special about a 1964 US nickel?

The only thing special is that there are so many of them. A total of almost 3 billion were minted, the first time more than a billion nickels were made at each mint, and that remains the highest mintage of any year. 1964 nickels still show up in change regularly.Why so many nickels?When the price of silver was deregulated silver coins started to be hoarded and melted. The resulting shortage of dimes, quarters, and halves caused huge problems for stores and banks. The Mint didn't yet have a substitute for silver that would work in vending machines and coin counters, so as a stopgap they produced enormous numbers of nickels. Until the current clad composition was developed for higher denominations in 1965, it was possible to receive 10 or 15 nickels in change!


What materials are nickels before 1964 made of?

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