#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int main()
{
    int a,b,r,n;
    fin>>n;
    for (int i=1;i<=n;i++){
    fin>>a>>b;
    while (b!=0)
        {
            r=a%b;
            a=b;
            b=r;
            }
            fout<<a<<"\n";
}
    return 0;
}