#include <bits/stdc++.h>
#include <fstream>

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

int main()
{
    int i,t,a,b,r;
    f>>t;
    for(i=1;i<=t;i++){
        f>>a>>b;
        while(b!=0){
            r=a%b;
            a=b;
            b=r;
        }
        g<<a<<'\n';
    }

    return 0;
}