#include <stdio.h>

int main() {
    FILE *fin, *fout;
    int n, a, b, r, i;

    fin = fopen( "euclid2.in", "r" );
    fout = fopen( "euclid2.out", "w" );

    fscanf( fin, "%d", &n );
    for ( i = 0; i < n; i++ ) {
        fscanf( fin, "%d%d", &a, &b );

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

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

    fclose( fin );
    fclose( fout );

    return 0;
}