i need help with ISBN10 numbersSolutionISBN The last digit o

i need help with ISBN-10 numbers

Solution

ISBN

The last digit of 10 digit ISBN

which must range consist of 0 to 10

And must be the sum of all 10 digit each multily by its own intiger decending from 10 to 1 which is multiple of 11.

s = (0*10)+(3*9)+(0*8)+(6*7)+(4*6)+(0*5)+(6*4)+(1*3)+(5*2)+(2*1)

= 0+27+0+42+24+0+24+3+10+2

= 132

= 12*11

Answer