Question 1047240
It's obviously not 
4 quarters
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The most you can get with 
3 quarters is:
3 quarters + 25 pennies = 28 coins
not enough
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2 quarters + 10 nickels = 12 coins
not enough
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2 quarters + 5 nickels + 25 pennies = 32 coins
too many
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2 quarters + 3 nickels + 1 dime + 25 pennies = 31 coins
still too many
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2 quarters + 1 nickel + 2 dimes + 25 pennies = 30 coins
OK