#include <bits/stdc++.h>

using namespace std;

ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int euclid(int a, int b){
    int c;
    while(b != 0){
        c = a%b;
        a = b;
        b = c;
    }
    return a;
}

int main() {
    int t,a,b,i;
    fin>>t;
    for(i = 1; i <= t; i++){
        fin>>a>>b;
        fout<<euclid(a,b)<<'\n';
    }
    return 0;
}