Testing two suspect silver coins (aka How to tie a string around a coin!)

Yesterday, I described how I had a suspiciously good price on a silver coin via . Now, there is a chance that I wa by bengy

Two Knotty Boys: Double Coin Knot

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6.2. Traversing Arrays with For Loops — AP CSAwesome

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1982 Lincoln Memorial Cent Mint Error - Flip Over Double Strike Or Fake? - Coin Community Forum