#include<fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int a,b,n,i;

void afisare()
{
	g<<a<<endl;
}
void citire()
{
	f>>a;
	f>>b;
}
int cmmdc(int x,int y)
{
	while(x!=y)
	{
		if(x>y) x=x-y;
		else y=y-x;
	}
	return x;
}
int main()
{
	f>>n;
	for(i=1;i<=n;i++)
	{
		citire();
		a=cmmdc(a,b);
		afisare();
	}
	f.close();
	g.close();
	return 0;
}