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

int main()
{
    ifstream in("euclid2.in");
    ofstream out("euclid2.out");
    int n, a, b, i, r;
    in>>n;
    for(i=1; i<=n; ++i)
    {
        in>>a>>b;
        while(b>0)
        {
            r=a%b;
            a=b;
            b=r;
        }
        out<<a<<"\n";
    }
     return 0;
}