#include <cstdio>

using namespace std;

int main()
{
    freopen("euclid2.in","r",stdin);
    freopen("euclid2.out","w",stdout);

    int n,a,b;
    scanf("%d",&n);
    int i,r;
    for(i=1;i<=n;i++)
        {
            scanf("%d%d",&a,&b);
            while(b)
                  {
                      r=a%b;
                      a=b;
                      b=r;
                  }
            printf("%d\n",a);
        }

    return 0;
}