#include <iostream>
#include <fstream>

using namespace std;

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

int main()
{
    int n, a, b;
    f >> n;
    for(int i=1; i<=n; i++){
        f >> a >> b;
        int r=a%b;
        if(b==0) g << a;
        else {
            r=a%b;
            while(r!=0){
                a=b;
                b=r;
                r=a%b;
            }
            g << b << endl;
        }
    }
    return 0;
}