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Mathematics, 01.03.2021 01:00 KetaFord1978

Is the following Credit Card Number Valid or Invalid 4678-2012-7421-4784? Valid
Invalid; d = 1
Invalid; d = 7
O Invalid; d = 9


Is the following Credit Card Number Valid or Invalid 4678-2012-7421-4784? Valid Invalid; d = 1 In

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Is the following Credit Card Number Valid or Invalid 4678-2012-7421-4784? Valid
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