#include <stdio.h>
 
#define minim(a, b) ((a < b) ? a : b)
 
int T, A, B;
 
int main(void)
{
    int i;
 
    freopen("euclid2.in", "r", stdin);
    freopen("euclid2.out", "w", stdout);
     
    for (scanf("%d", &T); T; --T)
    {       
        scanf("%d %d", &A, &B);
        for (i = minim(A, B); i; --i)
            if (A % i == 0 && B % i == 0)
            {
                printf("%d\n", i);
                break;
            }
    }
 
    return 0;
}