#include<fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int main()
{int a,b,c,n;
fin>>n;
while(n--)
    {fin>>a>>b;
    while (b)
    {
        c = a % b;
        a = b;
        b = c;
    }
    fout<<a<<endl;
    }
}