Verbal Reasoning - Mental Ability Questions

Three words in bold letters are given in each question, which have something in common among themselves. Out of the four given alternatives, choose the most appropriate description about these three words.

Vesuvius: Etna: Kilimanjaro

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
25 + 10 ÷ 240 x 16 = ?

If South-East is changed to North and North-East to West and so on, then what will come in place of South?

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.

Money, Amity, Camera, Animal, Telomere, ?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
a _ bc _ a _ bcdabc _ da _ cd _

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

HI, MN, RS, ?

In the following question, select the number which can be placed at the sign of ? from the given alternatives.