#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;
}