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?

PE_NP_ON_EO_

In a certain code language, '-' represents 'x', '÷' represents '+', '+' represents '÷' and 'x' represents '-'. Find out the answer to the following question.

18 ÷ 12 - 5 + 30 x 6 = ?

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

Elephant

From the given words, select the word which cannot be formed using the letters of the given word. ALTERNATIVES

If BLACK = AMZDJ then BEAUTIFUL = ?

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

Mindboggling

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

Disbursement

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
LOP, MPQ, NQR, ORS, ?