1,3,5,11,21,()
A.25 B.32 C.43 D.46
1,1,3,5,11,()A.8 B.13 C.21 D.32
1 3 5 11 21 () 85 A.33 B.41 C.43 D.53
1/2,3/2 ,11/8 ,21/32 ,()A. 7/64 B. 25/64 C.12/31 D. 13/64
1,3,5,11,21,()A.25 B.32 C.43 D.46
1,3,5,11,(),43 A.18 B.21 C.23 D.25