#include<iostream>
#include<fstream>
using namespace std;

    int main()
    {
        int a,b,t,r;
        ifstream f("euclid2.in");
        ofstream o("euclid2.out");
        f>>t;
        for(int i=1;i<=t;i++)
        {
            f>>a>>b;
            while(b!=0)
            {
                r=a%b;
                a=b;
                b=r;
            }
            cout<<a<<endl;
        }
    }