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

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


int main(){

    int T;
    long long a,b;
    f>>T;
    for(int i=1;i<=T;++i){
        f>>a>>b;
        while(b){
            int r=a%b;
            a=b;
            b=r;
        }

        g<<a<<"\n";
    }
}