Verbal Reasoning - Mental Ability Questions

In the following question, select the odd number pair from the given alternatives.

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 ?

Select the related word/letters/number from the given alternatives.
ABDE : FGIJ :: IJLM : ?

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

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series:

8,24,12,?,18,54

If "S" denotes "multiplied by", "V" denotes "subtracted from", "M" denotes "added to" and "L" denotes "divided by", then 8 V 10 M 96 L 6 S 9 = ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

CAL, AWF, YSZ, WOT, ?

Choose the most appropriate word ‘ACCIDENT’ is to ‘CAREFULNESS’ as ‘DISEASE’ is to