#include <stdio.h>

using namespace std;

int div(int a, int b)
{
    int r;
    while(b)
    {
        r=a%b;
        a=b;
        b=r;
    }
    return a;
}

int main()
{
    freopen("euclid2.in","r",stdin);
    freopen("euclid2.out","w",stdout);
    int t;
    scanf("%d",&t);
    while(t--)
    {
        int a;
        int b;
        scanf("%d %d",&a,&b);
        printf("%d\n",div(a,b));
    }
    return 0;
}