#include <iostream>
#include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
unsigned long long n,N,S,P;

int main()
{
 int t, a, b;
    f >> t;
    for(int i = 0; i < t; i++){
        f >> a >> b;
        int r;
        while(b){
            r = a%b;
            a = b;
            b = r;
        }
        g << a <<"\n";
    }
    return 0;


}