Verbal Reasoning - Mental Ability Questions

Find the odd word/letters/number pair from the given alternatives.

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
1, 7, 42, 210, 840, ?

The following question consist of two words that have a certain relationship to each other, followed by four alternatives. Select the best alternative that has the same relationship as the original pair of words

Liquor: Drink

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

NO_PQN_PP_NOP_Q

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

BC, OP, DE, QR, ?

Out of the 100 nature lovers, 20 people wanted to see only bison, 30 wanted to see both bison and tiger, 15 wanted to see only leopard, 25 wanted to see only tiger, 5 wanted to see both bison and leopard and the remaining wanted to see only bear.

How many people who wanted to see bison did not want to see leopard?

A word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as shown in the given two matrices. The columns and rows of Matrix-I are numbered from 0 to 4 and that of Matrix-II are numbered from 5 to 9. A letter from these matrices can be represented first  by its row and next by its column ,for example 'F' can be represented by 32,42 etc and 'M' can be represented by 88,68 etc. similarly,you have to identify the set for the word ''TEST''.

Select the missing number from the given options?