#include <fstream>
using namespace std;
int main()
{
    freopen("euclid2.in", "r", stdin);
    freopen("euclid2.out", "w", stdout);
    int n,a,b,r;
    scanf("%d", &n);
    for(int i=0;i<n;i++)
    {
        scanf("%d %d", &a, &b);
        while(b)
        {
            r=a%b;
            a=b;
            b=r;
        }
        printf("%d\n",a);
    }
    return 0;
}