"you can check what is the minimum number of one is required to make it divisible by 7. I got that minimum 6 1's should be present so if n>=3 it is divisible by 7 regardless the value of d"
can you pls explain the above part. If n>=3 then number is divisible by 7, can I read proof of this somewhere?
"you can check what is the minimum number of one is required to make it divisible by 7. I got that minimum 6 1's should be present so if n>=3 it is divisible by 7 regardless the value of d"
can you pls explain the above part. If n>=3 then number is divisible by 7, can I read proof of this somewhere?