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

}