#include<fstream>
using namespace std;
ifstream in ("euclid2.in");
ofstream out("euclid2.out");
int main(){
	int t,a,b,r,cmmdc;
	in>>t;
	while(t--){
		in>>a>>b;
		while(b){
			r=a%b;
			a=b;
			b=r;
		}
		cmmdc=a;
		out<<cmmdc<<"\n;";
	}
	return 0;
}