#include<fstream.h>
int a,b,c,n,i;
int main(){
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    f>>n;
    for(i=1;i<=n;i++){
        f>>a>>b;
        while(b){
            c=a%b;
            a=b;
            b=c;
        }
        g<<a<<"\n";
    }
    return 0;
}