Disclaimer :- In support of better world, i condemn all kinds of piracies and severely disparage the people who do credit card forging and fraud. This knowledge is already in public domain. I was too ignorant to discover it quite late.
Do you know that the numbers on your credit card hold a pattern? If they deviate from a pattern, then they are invalid. I did not know this till morning. What is it? I’m putting it in form of this mathematical expression. You need to tell me what it means.
$latex \bigg[ \sum_{i=1}^{16} \big[ [((i + 1) \bmod{2}) x_i ] + [(i \bmod{2}) (2x_i \bmod{9} )] \big] \bigg] \bmod {10} = ?$
where $latex x_{i}$ is $latex i ^{th}$ digit of your credit card number. (e.g) $latex x_{1}$ is first digit of your credit card, and $latex x_{16}$ is last digit of your credit card. You will find it interesting. Post your solutions!
Updates :- I forgot to mention that kaddy was the person who initiated this. He is a wonderful photographer. Vote for his photographs at aminus3.
ashish
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Kalam
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Kalam
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Kalam
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ashish
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a
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Shashikant
