Dutch Bank Accounts

Dutch bank accounts are 10 digit numbers (currently the first digit is always zero) which are protected by a special numerical check.
Each digit is multiplied by a factor ranging from 10 to 1. The calculation results are then summed together. Finally, to be a valid bank account, the sum must be divisible by 11.

Example (account: 067.89.54.321):

0 6 7 . 8 9 . 5 4 . 3 2 1
* * * * * * * * * *
10 9 8 7 6 5 4 3 2 1
= = = = = = = = = =
0 + 54 + 56 + 56 + 54 + 25 + 16 + 9 + 4 + 1 = 275 = N*11


1996-08-21