#include <iostream>
#include <fstream>

using namespace std;

ifstream f("euclid2.in");
ofstream g("euclid2.out");

int main() {
    int i, a, b, r, n;
    
    f >> n;
    
    for(i = 1; i <= n; i++) {
        f >> a >> b;
        
        while(b != 0) {
            r = a % b;
            a = b;
            b = r;
        }
        g << a << endl;
    }
return 0;
}