1.21,60,104,154,211,() A.245 B.276 C.298 D.313
2.-2,0,4,12,() A.22 B.24 C.26 D.28
3.2,3,4,(),16,29,54 A.9 B.11 C.13 D.14
4.60,65,(),16,29,54 A.42 B.24 C.10 D.-1
5.15,21,29,39,() A.51 B.55 C.61 D.65