Verbal Reasoning - Mental Ability Questions

Which one of the following diagram represent the relationship among Parliament, Council of Ministers and Prime Minister?

Options:

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
ZYX, VUT, QPO, MLK, HGF, ?

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?

M_P_M_R_PM_PM_RR_P

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
AY, CW, EU, ?

If CHANTED is coded as ZEXKQBA, then how will MAY be coded as?

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

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

Threatened

14 notebooks of a class were corrected with ink pen while 22 notebooks were corrected with colour pencil. If 4 notebooks were corrected with both, what is the strength of class?