Verbal Reasoning - Mental Ability Questions

How many such pairs of letters are there in the word REGIONAL, each of which has as many letters between them in the word (in both forward and backward directions) as they have between them in the English alphabetical series ?

If IRON is written as GOKI, then KNIFE may be written as

If FHNPKMEG means GOLF, then what does RTSUHJBDJL stand for?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

a_d_bd_ab_dd

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
6, 18, 54, ? , 486, 1458

Choose from the four diagrams given below, the one that illustrates the relationship among 'Languages', 'French' and 'German'.

Square is related to Line in the same way as Cube is related to

From the given words, select the word which cannot be formed using the letters of the given word.
FAMISHED