This is a system of equations.
Let d= number of dimes.
q= number of quarters.
d+q=1000 -> 10d + 10q = 10000
.10d+.25q=199.90-> -10d+(-25q)=-19990
Multiply each equation to get one of the variables to drop out.
Add the equations.
(-15q)=(-9990)
q=666
1000-666=334
There are 666 quarters and 334 dimes.
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1000 quarters is $250
10000 pennies, or 1000 dimes.
1000
If you had 1000 US quarter coins, it would mean you have the equivalent of $250 US dollars. This can be solved by taking 1000 and multiplying it by .25 A more interesting question is how much would all those coins weigh? To fill a roll of quarters takes 40 quarters, and a roll of quarters equals $10. Each roll of quarters weighs roughly half a pound. Therefore 1000 quarters would weigh 50 pounds, that is a lot of weight to carry around in coinage when it could all be replaced by two $100 bills and a $50 bill and fit easily in your pocket.
The answer is one $1,000 bill. There are 10 dimes in $1.00. 10 dimes divided into 10,000 dimes = $1,000.00.