4,5,15,6,7,35,8,9,()
A.27
B.15
C.72
D.63
4,5,15,6,7,35,8,9,() A.27 B.15 C.72 D.63
:3/15,1/3,3/7,1/2,()。A.5/8 B.4/9 C.15/27 D.-3
4,5,15,6,7,35,8,9,()A.27 B.15 C.72 D.63
4,6,5,7,7,9,11,13,19,21,(),() A.27,29 B.32,33 C.35,37 D.41,43
4,5,15,6,7,35,8,9,()A.27B.15 C.72D.63
4,5,15,6,7,35,8,9,()A.27 B.15C.72D.63