#include<fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int main()
{
    int n,i,x,y,r;
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>x>>y;
		while(y)
		{
			r=x%y;
			x=y;
			y=r;
		}
		fout<<x<<"\n";
    }
    return 0;
}