some typos
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@@ -749,7 +749,7 @@ If this sum has a remainder of 0 when dividing by 10, the credit card number is
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iszero(rem(z,10))
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```
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Darn. A typo. is `4137 8947 1175 5804` a possible credit card number?
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Darn. A typo. is `4137 8047 1175 5804` a possible credit card number?
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```{julia}
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#| hold: true
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