#include <fstream>

using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int a , b , n;
int cmmdc(int a, int b) {
    int r=a%b;
    while(r) {
        a=b;
        b=r;
        r=a%b;
    }
    return b;
}
int main() {
    fin>>n;
    for (int i=1; i<=n; i++)
        fin>>a>>b, fout<<cmmdc(a,b)<<'\n';

    return 0;
}