0,8,24,48,80,()
A.120
B.116
C.108
D.100
120,48,24,8,() A.0;B. 10;C.15;D. 20;
3,8,24,48,120,() A.168;B.169;C.144;D.143;
0, 8, 24, 48, 80, () A.120 B.116 C.108 D.100
0, 6, 24, 60, ()。A.116 B.120 C.121 D.144
0,6,24,60,()A.70 B.80 C.100D.120
0,6,24,(),120 A.48 B.56 C.60 D.64