Reasoning

18 : 324 :: 20 : ?

28 : 784 :: 30 : ?

8 : 64 :: 10 : ?

6 : 36 :: 8 : ?

16 : 256 :: 18 : ?

22 : 484 :: 24 : ?

20 : 400 :: 22 : ?

30 : 900 :: 32 : ?

26 : 676 :: 28 : ?

4 : 16 :: 6 : ?

10 : 100 :: 12 : ?

24 : 576 :: 26 : ?

32 : 1024 :: 34 : ?

X is Y's father; Y is Z's sister. X is Z's ?

Ravi's sister is Meena; Meena's son is Amit. Ravi is Amit's ?

X is Y's father; Y is Z's sister. X is Z's ?

Ravi's sister is Meena; Meena's son is Amit. Ravi is Amit's ?

X is Y's father; Y is Z's sister. X is Z's ?

Ravi's sister is Meena; Meena's son is Amit. Ravi is Amit's ?

X is Y's father; Y is Z's sister. X is Z's ?

Ravi's sister is Meena; Meena's son is Amit. Ravi is Amit's ?

X is Y's father; Y is Z's sister. X is Z's ?

Ravi's sister is Meena; Meena's son is Amit. Ravi is Amit's ?

X is Y's father; Y is Z's sister. X is Z's ?

Ravi's sister is Meena; Meena's son is Amit. Ravi is Amit's ?