Answer / vinod

main()
{
long int f=0,ans=0;
for(int i=0;i<7;i++)
{
f=f*10+5;
ans+=f;
}
printf("%ld",ans);
}

Answer / ashish

#include<stdio.h>
#include<math.h>
void main()
{ long int f=0,ans=0,i;
clrscr();
for(i=0;i<7;i++)
{
f=f*10+5;
ans+=f;
}
printf("%ld",ans);
getch();
}

Answer / arjun

The actual answer is 6172835.But integer range is only -32768
to 32767.so the actual answer cannot be displayed.

Answer / sunny

Hi Guys,

The answers above are correct but i was wondering if one has to add 5+55+555+.... till 'n'digits then??

Then the answer would be

#include<stdio.h>
#include<math.h>
void main()
{

long int res=0;
int n;
printf("The Maximum Digit(i.e. if youy want result upto 555 then enter '3'):");
scanf("%d",&n);

res= (5*pow(10,(n+1)) - 50 -(45*n))/81;
// VII standard maths
printf("%ld",res);
}


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