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

int euclid(int a, int b)
{
    int c;
    while (b) {
        c = a % b;
        a = b;
        b = c;
    }
    return a;
}
    int n,x,y;
int main()
{
    in>>n;
    for(int i=1;i<=n;i++){
        in>>x>>y;
        out<<euclid(x,y)<<'\n';

    }
    return 0;
}