#include <iostream>
#include <fstream>

using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");


int euclid(int a, int b)
{
    int c;
    while (b) {
        c = a % b;
        a = b;
        b = c;
    }
    return a;
}
int main()
{  int n,i,x,y;
    f>>n;
    for(i=1;i<=n;i++)
    {
        f>>x>>y;
        g<<euclid(x,y)<<endl;
    }}