#include <bits/stdc++.h>

using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int gcd(int a, int b){
    if(b == 0) return a;
    return gcd(b, a % b);
}
int main()
{
    int n,i,a,b;
    fin >> n;
    for(i = 1; i <= n; i++){
        fin >> a >> b;
        if(b > a) swap(a,b);
        fout << gcd(a,b) << "\n";
    }
    return 0;
}