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  2. Rare Currency: How To Find Out If Your Bills and Coins Are ...

    www.aol.com/rare-currency-bills-coins-worth...

    Check Out: 5 Genius Things All Wealthy People Do With Their Money How can you tell if paper money and coins are valuable? Look for Oddities To Find Out If the Currency Is Rare

  3. Checking whether a coin is fair - Wikipedia

    en.wikipedia.org/wiki/Checking_whether_a_coin_is...

    In statistics, the question of checking whether a coin is fair is one whose importance lies, firstly, in providing a simple problem on which to illustrate basic ideas of statistical inference and, secondly, in providing a simple problem that can be used to compare various competing methods of statistical inference, including decision theory.

  4. Experts Explain How To Assess Whether Your Old Coins or Bills ...

    www.aol.com/experts-explain-assess-whether-old...

    Coin collecting, sometimes called numismatics, can be more than a hobby for some. It can be a money-making investment. The same goes for collecting, saving or reselling old paper money. Learn: 5 ...

  5. Currency detector - Wikipedia

    en.wikipedia.org/wiki/Currency_detector

    A currency detector or currency validator is a device that determines whether notes or coins are genuine or counterfeit.These devices are used in a wide range of automated machines, such as retail kiosks, supermarket self checkout machines, arcade gaming machines, payphones, launderette washing machines, car park ticket machines, automatic fare collection machines, public transport ticket ...

  6. I’m a Rare Coin Collector: How To Spot Valuable Coins

    www.aol.com/finance/m-rare-coin-collector-spot...

    According to Heritage Auctions, “U.S. coins are avidly collected by date and mintmark, and the presence or absence of a mintmark can mean huge differences in the value of a coin.”

  7. Numismatic Guaranty Company - Wikipedia

    en.wikipedia.org/wiki/Numismatic_Guaranty_Company

    The NGC Census reports how many examples of each issue NGC has certified by grade, which helps determine relative rarity. Census figures are often falsely inflated due to resubmissions of the same coins. NGC Coin Price Guide lists pricing data for most US coin (and some modern Chinese) issues. NGC Auction Central reports auction prices realized ...