I have 1 more before I sleep... My credit card
4 sets of numbers, 4 numbers per set. Reading the numbers backwards, I read em by tens to make em a pair of 2-digit numbers per set now. For each set, I add the two pairs of numbers [still read backwards],
So it'll look like this; take for example the last set of numbers in my card which is 1202. Backwards it is 2012, read em by tens so it is now 20 and 12, subtract and it is 20-12=8. Second to the last set of numbers is 0664; 64-60=4. Same goes for the first two sets of numbers.
now add the result of the subtraction of pairs of numbers for each set, from the first two sets and last two sets,
I will take my last two sets of numbers as example again, just as what I mentioned above. 8+4=12.
separate em and here's what I came up with.
Sum of the pairs added from the first two sets of numbers = 39
Sum of the pairs added from the last two sets of numbers = 12
Next step: Subtraction. First two sets minus last two sets, so it will be 39-12 = 27. I will name this number "A".
So I search for more numbers, and here's what I saw:
Member since 08 Valid From 06/08 To 04/10
This time, I will take these numbers, and list em from the rightmost number I see to the leftmost. 10, 04, 08, 06, 08.
I thought of fusing addition and subtraction, so I will add then take the result to subtract from the next number then add again and so on... With the same sequence, 10, 04, 08, 06 and 08.
10 + 04 = 14
14 - 08 = 06
06 + 06 = 12
12 - 08 = 04
Final answer? 4. I will name this number "B".
A minus B
27 - 4
And eh? Ends up to be just like my birth date minus birth month ^^
Equals to... 23
Sorry I was bored, now I gotta sleep >_>
BONUS QUESTION: Guess my credit card number c[=
^ won't happen in a million years, and even if so it won't be any benefit to you
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