Answer:
#include <iostream>
using namespace std;
int main()
{
int n = 15;
for(int i=3; i<=n; i=i+3){
cout<<i;
cout<<" ";
}
return 0;
}
Explanation:
Used for loop to calculate number and display it. for start with 3(int i=3), increment by 3(i=i+3) and stop when 15 came (i<=n where n is 15).
