#include <stdio.h>
int main()
{
	int r,a,b,t,i;
	FILE *f1,*f2;

	f1=fopen("euclid2.in","r");
	f2=fopen("euclid2.out","w");

    fscanf(f1,"%d",&t);
    for (i=1; i<=t; i++)
    {
 	    fscanf(f1,"%d%d",&a,&b);

    	while (a%b!=0)
	    {
		    r=a%b;
		    a=b;
		    b=r;
	    }
	    if (b!=1) fprintf(f2,"%d\n",b);
	    else fprintf(f2,"1\n");
     } 
	fclose(f1);
	fclose(f2);
	return 0;
}