#include <iostream>
#include <fstream>

using namespace std;

ifstream fin  ("euclid2.in");
ofstream fout ("euclid2.out");

int n, a, b, r;

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