#include<fstream>
using namespace std;
ifstream cin("euclid2.in");
ofstream cout("euclid2.out");

int cmmdc(int a,int b)
{
    while(b!=0)
        {
            int r=a%b;
            a=b;
            b=r;
        }
    return a;
}

int main()
{
    int a,b,dummy;
    cin>>dummy;
    while(cin>>a>>b)
        {
            if(b>a)
                swap(a,b);
            cout<<cmmdc(a,b)<<'\n';
        }
    return 0;
}