Answer Posted / akhilesh singh(m.c.a-iisem ois

main()
{
int i,j=2,ch=0;
clrscr();
printf("\nENTER ANY NUMBER");
scanf("%d",&i);
while(j<=i/2)
{
if(i%j==0)
{
printf("%d IS NOT PRIME",i);
ch=1;
break;
}
else
{
j++;
}
}
if(ch==0)
{
printf("%d IS PRIME",i);
}
}

if the area was hit by a virus and so the decrease in the population because of death was x/3 and the migration from other places increased a population by 2x then annually it had so many ppl. find our the population in the starting.

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