#include <iostream>
#include <fstream>

using namespace std;

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

int n,x,y;

int euclid(int a, int b){
    int r;
    while(b>0){
        r=a%b;
        a=b;
        b=r;
    }
    return a;
}

int main(){
    f>>n;
    for(int i=1; i<=n; ++i){
        f>>x>>y;
        g<<euclid(x,y)<<'\n';
    }
    return 0;
}