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

int euclid (int a, int b) {
    while (a != b) {
        if (a > b) {
            a -= b;
         } else {
            b -= a;
         }
    }
    return a;
}

int main() {
    int n, a[100001], b[100001];
    fin >> n;
    for (int i = 1; i <= n; ++i){
        fin >> a[i] >> b[i];
    }
    for (int i = 1; i <= n ; ++i) {
        fout << euclid(a[i], b[i]) << "\n";
    }
    return 0;
}