Check Digit

[skghosh44]

Here is some 11 digit numbers. The first 10 digit are actual Number and the 11th digit is a check digit. Now I wish to know how to find out the last digit i.e the check digit.

1077631548-1
1077631688-1
1077631790-9
1077631810-8
1077631874-3

I shall be glad to know the formula/procedure to calculate the check digit taking into account of first 10 digit in excel format.

thanks in advance

[skghosh44]

Any one to find out the formula?????
It will be a grate help for me.

[Crazykiller]

What are chck digits??

I dont know anything abt them.