#include<stdio.h>
int i,a,b,r,T;

int main(){

FILE *f=fopen("euclid2.in","r");
FILE *g=fopen("euclid2.out","w");

fscanf(f,"%d",&T);

for(i=1;i<=T;i++){
fscanf(f,"%d %d",&a,&b);


while(b!=0){
r=a%b;
a=b;
b=r;
}

fprintf(g,"%d\n",a);
}

fclose(f);
fclose(g);

return 0;
}