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