#include<stdio.h>
int cmmdc(int a,int b)
{
    int r;
    while(a%b!=0)
    {
      r=a%b;
      a=b;
      b=r;
      }
return b;
}
int main()
{
    freopen("euclid2.in","r",stdin);
    freopen("euclid2.out","w",stdout);
    int T,i,j,v[200001],x[100001];
    scanf("%d",&T);
    for(i=1;i<=2*T;i++)
	  scanf("%d",&v[i]);
    for(j=1;j<=T;j++)
    {     
     x[j]=cmmdc(v[2*j-1],v[2*j]);
     printf("%d\n",x[j]);
     
     }
     return 0;
     }