Verbal Reasoning - Mental Ability Questions

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
10, 29, 66, 127, ?

Choose the related word/letters/number from the given alternatives.
AF : BE : : ? : DH

In this question, some equations are solved on the basis of a certain system. On the same basis find out the correct answer from amongst the four alternatives for the unsolved equation.

7x6x8=678
8x9x7=987
6x5x7=567
5x4x6=?

In a certain code language, “LUNGS” is written as “OWQIV”. How is “HEART” written in that code language?

If in a certain code language, "STUBBORN" is written as "TUVCANQM". How is"TRAINING" written in that code language?

Select the related word/letters/number from the given alternatives.
Farmer : Plough:: Painter: ?

X and Y are brothers. R is the father of Y. T is the sister of S who is maternal uncle of X. How is T related to R?

Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
H__JH__IJHHI__HH__JH