Verbal Reasoning - Mental Ability Questions

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

ab_ _abbc_aa_bbb

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

FU, GT, HS, IR, ?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
642 x 6 ÷ 25 + 4 = ?

In a certain code language, “LATIN” is written as “ODWLQ”. How is “ROUTE” written in that code language?

From the given alternative words, select the word which cannot be formed using the letters of the given word:
ECCENTRICITY

In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with someLogic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives

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

Laugh, Alter, Melts, Realm, Muesli, ?

Courtroom : Judge :: Stadium : ___