#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int main()
{
    int a,b,x,r,i;
    fin>>x;
    for (i=1;i<=x;i++)
    {
        fin>>a>>b;
        while (b>0)
        {
            r=a%b;
            a=b;
            b=r;
        }
        fout<<a<<"\n";
    }
    fin.close();
    fout.close();
    return 0;
}