#include <iostream>
#include <cstdio>
using namespace std;

int main()
{
    freopen("euclid2.in","r",stdin);
    freopen("euclid2.out","w",stdout);
    int n, a, b;
    scanf("%d",&n);
    for(int i=1; i<=n; i++)
    {
        scanf("%d %d",&a, &b);
        int r;
        while(b)
        {
            r = a%b;
            a = b;
            b = r;
        }
        printf("%d\n",a);
    }
    return 0;
}