HP 3000 Manuals

HP Data Entry and Forms Management System (VPLUS/V)

MODULUS 10 

Modulus 10 calculations detect single transpositions and incorrect keying
of a single digit.  The calculation is performed as follows:

 *  The units position and every alternate position of the basic number
    is multiplied by 2.

 *  The digits resulting from the multiplication are added to those that
    were not multiplied.

 *  The total is subtracted from the next higher number ending with zero.
    The result is the check digit.

Example 

Assume a basic number                       9 6 4 3 8

Unit and every alternate                    9   4   8

Multiplied by 2                             18   8  16

Digits not multiplied                       6   3

Add them together                           1+8+6+8+3+1+6 = 33

Next higher number ending in zero           40

Subtract sum of digits                      -33

Check digit =                               7

The base number with check digit            964387 

MPE/iX 5.0 Documentation