#include<stdio.h>
FILE * f=fopen("euclid2.in","r");
FILE * g=fopen("euclid2.out","w");
int a,b,t,r,i;
int main()
{
	fscanf(f,"%d",&t);
	for(i=1;i<=t;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);
	}
	fclose(f);
	fclose(g);
	return 0;
}