Which of the following number is divisible by 9

In a certain code word ACEG is written as 16 and DFGH is written as 25 then how can be written HIKM

Choose the correct option to complete the alphabet letter series.

AB_B, BC_C, _ AB _ AB _ B

Choose the correct option to complete the alphabet letter series

_ABA_CABC_DCBA_BAB_A

If SOLAR is coded as WSPEV then LUNAR is decoded as

If A is older than B, C is older than B but younger than A. D is younger than E and B. B is older than E. then identify who is youngest