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?
l m _ o _ n m _ l _ n _ _ n m l

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
RS, ZA, HI, ?

If '+' means 'x' , '­' means '÷' , 'x' means '­' and '÷' means '+' , then what will be the value of 16 ÷ 4 x 10 ­ 5 + 8 = ?

Selecttherelatedword/letters/numbersfromthegivenalternatives: Sanitation:Illness::Care:?

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
400, -200, 100, ? , 25, -12.5

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

13,25,49,85, ?

In a certain code language, "DURING" is written as "GRUFQD". How is "PICKED" written in that code language?

Choose the odd word/letters/number/number pair from the given alternatives.