#include <iostream>
#include <fstream>

using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int main()
{
    int n,a,b,i,r;
    fin>>n;
    for(i=1;i<=n;i++)
        {
            fin>>a>>b;
            while(b)
                {
                    r=a;
                    a=b;
                    b=r%b;

                }
            fout<<a<<'\n';
        }
    return 0;
}