#include <iostream>
#include <fstream>
using namespace std;
ifstream fin ("euclid2.in");
ofstream fout ("euclid2.out");
int t,a,b,r;
int main()
{
    fin>>t;
    for(int i=1;i<=t;i++)
    {
        fin>>a>>b;
        while(b)
        {
            r=a%b;
            a=b;
            b=r;
        }
        fout<<a<<'\n';
    }
    return 0;
}