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