#include <stdio.h>
int main(){
FILE *f,*g;
long t,a,b;
f=fopen("euclid2.in","r");
g=fopen("euclid2.out","w");
fscanf(f,"%ld",&t);
for(long i=1;i<=t;i++){
fscanf(f,"%ld%ld",&a,&b);
long r=0;
while(b!=0){
r=a%b;
a=b;
b=r;
}
fprintf(g,"%ld\n",a);
}
fclose(f);
fclose(g);
return 0;
}