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