Step one
Take the credit card number below and double every other digit from the left (marked in raised numbers below). (I got this number off an ad on the internet).
5424 1801 2345 6789
5x2=10; 2x2=4; 1x2=2; 0x2=0; 2x2=4; 4x2=8; 6x2=12; 8x2=16.
(You should come up with the following sequence of numbers: 10, 4, 2, 0, 4, 8, 12, and 16.)
Step two
Add the new numbers (10, 4, 2, 0, 4, 8, 12, and 16) to the numbers you didn't double (4, 4, 8, 1, 3, 5, 7 and 9) in the above card number.
All double digits (like 10, 12 and 16) should be added as a sum of their digits. An example would be: 10 becomes 1+0; 12 becomes 1+2 and 16 becomes 1+6).
1+0+4+4+4 + 1+8+0+1 + 4+3+8+5 + 1+2+7+1+6+9 = 69
Step three
If the final sum is divisible by 10, then the credit card number is valid. If it cannot be divided by 10, the number is invalid or fake.
69 10 = 6.9
As you can see, the number I got off the ad is a fake or invalid number. Grab a credit card out of your wallet and try this simple and fun test.
SourceGet all our blog postings delivered in your inbox.Type your Email address Here
For more Click Teentweensblog
Follow us On Twitter
Empire State Building. It is a 102-story skyscraper in New York City that is located at the intersection of Fifth Avenue and West 34th Street. Being 1472 feet (448 metres) tall, this was the tallest building in the world for over 40 years since its completion in 1931. Only in 1972 when the North Tower of the World Trade Center was built, the Empire State Building was deposed as the world’s highest skyscraper.
