Verbal Reasoning - Mental Ability Questions

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first numberby a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one.

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

DYNAMITE

Select the related word/letters/numbers from the given alternatives: 6 : 42 :: 12 : ?

If EARTHQUAKE is coded as EKAUQHTRAE then ELECTORATE will be coded as ?

From the given alternatives, select the word which CANNOT be formed using the letters of the given word.

Reapproachement

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

LEGIBILITY

From the given alternatives, select the word which CANNOT be formed using the letters of the given word.

Obliterate

Aman started running from his school, he first ran for 11 km towards south, then he turned towards west and ran √23 km in that direction. How far (in km)and in which direction is Aman now from his school?