#include <iostream>
#include <fstream>

using namespace std;
 int cmmdc(int a, int b)
  {
    int m , cm;
    if( a < b ) {
        m = a;
    }else{
    m = b ;

    }

    for ( int i=1 ;i <= m ; i++){
        if ( (a % i == 0 ) && ( b % i == 0 ) ) {
            cm = i ;
        }
    }
    return cm;
  }
int main(void)
{
    int a , b, c ;
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    f >> c ;
    for(int i=1;i<=c;i++){
        f >> a; f>> b;
        g << cmmdc(a,b)<<"\n";

    }
    f.close();
    g.close();


    return 0;
}