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  2. Coin problem - Wikipedia

    en.wikipedia.org/wiki/Coin_problem

    With only 2 pence and 5 pence coins, one cannot make 3 pence, but one can make any higher integer amount. Frobenius coin problem with 2-pence and 5-pence coins visualised as graphs: Sloping lines denote graphs of 2 x +5 y = n where n is the total in pence, and x and y are the non-negative number of 2p and 5p coins, respectively.

  3. Coin roll hunting - Wikipedia

    en.wikipedia.org/wiki/Coin_roll_hunting

    In Canada, coin roll hunters obtain rolls of nickels, and sometimes dimes and quarters. Dimes and quarters didn't have high mint numbers until silver was discontinued in the middle of 1968. After 1968, coins were minted in very high numbers, making silver coins uncommon, plus the introduction of silver-rejecting bank machines took many silver coin

  4. United States Mint coin sizes - Wikipedia

    en.wikipedia.org/wiki/United_States_Mint_coin_sizes

    Dimes, quarters and half dollars are also struck in 90% silver for special annual collector's sets. The silver-colored Susan B. Anthony dollar was replaced with gold-colored Sacagawea dollar in 2000 and Presidential Dollars 2007-2016; though the composition changed, the coin's size and weight remain the same.

  5. United States Mint coin production - Wikipedia

    en.wikipedia.org/wiki/United_States_Mint_coin...

    "Circulating Coins Production data". United States Mint. Archived from the original on March 14, 2016. United States Mint. Archived 2017-01-31 at the Wayback Machine; Archived 2007-03-14 at the Wayback Machine dead links "50 STATE QUARTERS". COINSHEET. Archived from the original on October 27, 2007. "Pennies Minted by the U.S. Mint from 1970 to ...

  6. Dime (United States coin) - Wikipedia

    en.wikipedia.org/wiki/Dime_(United_States_coin)

    The change also ensured the quarter dollar (which is valued 2.5 times the dime) weighed 2.5 times the dime (6.25g), and the half dollar (twice the value of the quarter dollar) weighed twice what the quarter dollar weighed (12.5g). In this way, a specific weight of these coins, no matter the mixture of denominations, would always be worth the same.

  7. Coins of the United States dollar - Wikipedia

    en.wikipedia.org/wiki/Coins_of_the_United_States...

    Coins of the United States dollar – aside from those of the earlier Continental currency – were first minted in 1792. New coins have been produced annually and they comprise a significant aspect of the United States currency system. Circulating coins exist in denominations of 1¢ (i.e. 1 cent or $0.01), 5

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