ISBN13: Checkdigit using MOD10 Method

                                             

1.     Find sum of digits at odd position

2.     Find sum of digits at even position and multiply result by 3

Sum of digits at odd position 9+8+1+7+2+2=29
9	7	8	3	1	2	7	3	2	3	2	0	?
Sum of digits at even position x 3 3 (7+3+2+3+3+)=54

3. Add both sums          (29+54=83 )

4.    Find Mod10          (83 MOD 10=3)

5.    If remainder=0 then

Check digit=0

Else

Check digit=10-Remainder                                            

Check digit 10-3=7