#include<iostream>
#include<fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int n,a,b,r,i;
int main()
{
    f>>n;
    for(i=0; i<n; i++)
    {
        f>>a>>b;
        while(b>0)
        {
            r=a%b;
            a=b;
            b=r;
        }
        g<<a<<endl;
    }
    f.close();
    g.close();
    return 0;
}