48,2,4,6,54,( ),3,9
A. 6;B. 5;C. 2;D. 3;
6,7,3,0,3,3,6,9,5,() A.4;B.3;C.2;D.1;
1/2,1/6,1/3,2,(),3,1/2 A.4;B.5;C.6;D.9
3,2,4,3,12,6,48,() A.18;B.8;C.32;D.9;
:1,1,3,6,2,8,13,104,(),()。 A.13,169 B.11,176 C.9,81 D.7,48
2,4,3,5,6,9,18,()。A. 14B. 24C. 27D. 36