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

int main()
{
    int T;
    int a,b;
    f >>  T;
    for(int i=0;i<T;i++)
    {
        f >>a >>b;
        int c;
    	while (b!=0) {
        	c = a % b;
        	a = b;
        	b = c;
    	}
    	g << a <<'\n';
    }
    return 0;
}