#include <bits/stdc++.h>
using namespace std;

ifstream f("euclid2.in");
ofstream g("euclid2.out");

int main()
{
    int T,a,b;
    f>>T;
    while(T){
        f>>a>>b;
        while(b){
            int r=a%b;
            a=b;
            b=r;
        }
        g<<a<<endl;
        T--;
    }
    return 0;
}