Verbal Reasoning - Mental Ability Questions

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

COMFORTABLE

Find the wrong number in the series. 225, 206, 188, 176, 165, 158, 153

In the following question, select the missing number from the given series.

2, 5, 12, 27, ?

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

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

Red, Orange, Yellow, ?

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

Ancillary

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

HPU, BJO, VDI, PXC, ?

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

A_BC_BBC_BB_