#include<cstdio>
 
using namespace std;
int n,x,y,aux;
void read(),solve();
int main()
{
    read();
    solve();
    return 0;
}
void read()
{
    freopen("euclid2.in","r",stdin);
    scanf("%d",&n);
}
void solve()
{
    freopen("euclid2.out","w",stdout);
    for(;n;n--)
    {
        scanf("%d%d",&x,&y);
        if(x%y==0)
        {printf("%d\n",y);continue;}
        if(y%x==0)
        {printf("%d\n",x);continue;}
        while(y)
        {
            aux=y;
            y=x%y;
            x=aux;
        }
        printf("%d\n",x);
    }
}