Verbal Reasoning - Mental Ability Questions

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series. 4, 13, 40, 121, ?

What will be the next set of alphabets in the series? AZ, BY, CX, ___

If 8α9 = -72, -9α3 = 27 and -6α1 = 6, then find the value of -3α6 = ?

If 8*2 = 3, 14*18 = -2 and 18*2 = 8, then find the value of 14*10 = ?

Select the odd letters from the given alternatives.

Select the related word/letters/number from the given alternatives.
30 : 16 :: 24 : ?

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

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
VWX, BCD, HIJ, ?