#include <iostream>
#include <fstream>

using namespace std;
ifstream f ("euclid2.in");
ofstream g ("euclid2.out");

int main()
{
	int n,i,a,b,r;
	f>>n;
	for(i=1;i<=n;i++){
		f>>a>>b;
		do{
			r=a%b;
			a=b;
			b=r;
		} while(r!=0);
	g<<a<<"\n";
	}

	return 0;
}