How To Validate (crack) A Credit Card Without A Computer [Mind Trick]

While we were doing some research on the internet we came across an interesting post on Mint.com which we think is interesting enough to share it with you. We are talking about how to validate (crack) a credit card without a computer (like a Java Script), using the father of all computing – the human brain.
Yes, that is correct you will be using your brain (mind) to find out how to validate (crack) a credit card using an algorithm that is not that tricky. You do not have to be a rocket scientist to solve this one out; you will just need some basic mathematical skills, so the lots of D’s that you got in college should do just fine.
Before letting you know how to validate (crack) a credit card without a computer, let’s first talk about what a credit card really is. Nowadays, the credit card is one of the most essential and used financial products, because it is owned and used by a high percentage of the world’s population willing to purchase goods or services.

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How To Validate (crack) A Credit Card Without A Computer [Mind Trick

If you want to understand how to validate (crack) a credit card without a computer, you first need to take a look at the 16 digits string of numeric characters that you can find on the back of the card. One could think that the 16 digits were chosen randomly but in fact they have a purpose in solving the issue using the algorithm from Mint.com. You may wonder how to validate a credit card without a computer just by using your mind and that algorithm. Well, here are the details that you were waiting for.

To make things a lot more relevant, I suggest you to use the 16 digits from your own credit card instead of the ones that we used in the how to validate (crack) a credit card without a computer guide.
Step 1: Take the credit card number and then double every number as per below:
-   4 4 1 7   1 2 3 4    5 6 7 8   9 1 1 3
-   4×2        1×2        1×2       3×2        5×2       7×2       9×2      1×2
Step 2: you should have a result like the one below
8 4 2 7   2 2 6 4   10 6 14 8   18 1 2 3
Step 3: replace the number that you doubled with the result and carry on till the end of the string
Step 4: all double digits numbers are now added as a sum of their digits, meaning that 84 now becomes 8+4. Keep doing this with the whole string of the credit card to find out how to validate (crack) a credit card without a computer.
If the final result is a number that can be divided by 10, then your credit card number is valid. If you reach to a result that cannot be divided by 10, then it is either invalid or fake. I think that you should try it out and see how to validate (crack) a credit card without a computer.
We checked if the algorithm from mint.com really works on a couple of our credit cards and it proved to be quite accurate. It has been tested on Visa and Mastercard but any it should be the same for any other type. If you’ve read our – how to validate (crack) a credit card without a computer guide, than you should give it a try on yours.
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