#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;
}