Ten dimes. Four quarters. Two halves. Any combination totaling a dollar face value contains the same 0.715 troy ounces of 90% silver. The math has been fixed since 1837.
"Junk silver" isn't junk — it's the nickname for circulated 90% silver coinage minted before the Coinage Act of 1965 ended silver in everyday change.
Because the Mint set fixed silver content per face dollar, any pre-1965 dime, quarter, or half-dollar contains the same proportional silver. A bag of 1,000 face-dollars (a "$1,000 face bag") holds ~715 troy ounces of pure silver. The math is the same whether the coins are dated 1880 or 1964.
This makes pre-65 silver one of the easiest ways to hold real money: denominated, divisible, recognizable, and impossible to counterfeit at the dime level.