#include<stdio.h>

int cmmdc(int x,int y)
{
	while(x!=y)
	{
		if(x<y) y=y-x;
		if(y<x) x=x-y;
	}
	return x;
}

int main()
{
	int n;
	freopen("euclid2.in","r",stdin);
	freopen("euclid2.out","w",stdout);
	int a,b;

	scanf("%d",&n);
	for(int i=1;i<=n;++i)
	{
		scanf("%d%d",&a,&b);
		printf("%d\n",cmmdc(a,b));
	}
	

	return 0;
}