#include<cstdio>

int nN;
int main()
{
    FILE *fin=fopen("euclid2.in", "r");
    FILE *fout=fopen("euclid2.out", "w");
    fscanf(fin,"%d", &nN);
    for (int i=1;i<=nN;i++)
    {
        int a,b;
        fscanf(fin,"%d %d", &a, &b);
        while (a!=0 && b!=0)
        if (a>b)
            a=a%b;
        else
            b=b%a;
        fprintf(fout, "%d\n", a>b?a :b);
    }
    return 0;
}