#include <stdio.h>
int divizor(int a, int b)
{
	while(a!=b)
	{
		if(a>b)
			a=a-b;
		else
			b=b-a;
	}
	return a;
}
int main()
{
	FILE *f = fopen("euclid2.in","r");
	FILE *g = fopen("euclid2.out","w");
	int t,x,y;
	fscanf(f,"%d",&t);
	for(int i=0;i<t;i++)
	{
		fscanf(f,"%d",&x);
		fscanf(f,"%d",&y);
		fprintf(g,"%d",divizor(x,y));
	}
	f.close();
	g.close();
	return 0;











}