#include <cstdio>
using namespace std;

FILE *f=fopen ("euclid2.in","r");
FILE *g=fopen ("euclid2.out","w");

int main(){
	int n,a,b,r,i;
	
	fscanf (f,"%d",&n);
	
	for (i=1;i<=n;++i){
		fscanf (f,"%d%d",&a,&b);
		r=a%b;
		while (r!=0){
			a=b;
			b=r;
			r=a%b;
		}
		fprintf (g,"%d\n",b);
	}
	
	return 0;
}