Wrack Your Brain With These 8 Mind Bending Logic Puzzles

If Bob is the son of Ellen, Ellen and Ava are sisters, Zelda is the mother of Ava, Peter is the son of Zelda, then:

Which letter is missing from this sequence: G, H, J, M, [?], V

In this code, ROSEBUD becomes EBFROQ. How would KITTENS be written?

A farmer had 17 chickens and 13 cows. All of the animals except 9 cows died. How many animals did he have left?

A is the mother of B and C. If D is the husband of C, what relation is A to D?

Which is the odd pair out?

Which pair of letters comes next in this alphabetical sequence: AZ, GT, MN, SH ... ?