#include <iostream>
#include <fstream>

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

int main()
{
    int n, i, r, b, a;
    f>>n;
    for (i=1; i<=n; i++){
        f>>a>>b;
        do{
            r=a%b;
            a=b;
            b=r;
        } while(r!=0);
        g<<a<<"\n";
    }

    return 0;
}