Verbal Reasoning - Mental Ability Questions

In the following question, select the odd word from the given alternatives.

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

3, 5/3, 1/3, ? , -7/3, -11/3

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

?, HI, OP, WX

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

xy_kx_zk_yzk xyz_ _

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
1, 5, 30, 210, 1680, ?

In the following question, select the odd word from the given alternatives.

Arrange the given words in the sequence in which they occur in the dictionary.
1. Dillydallying
2. Dillydallied
3. Dillydally
4. Dilled
5. Dillydallies

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

54, 51, 48, 45, 42, ?