Verbal Reasoning - Mental Ability Questions

In the following question, select the related word from the given alternatives.
Calendar : Date : : Index : ?

If 16α1 = 8, 14α6 = 42 and 12α5 = 30, then find the value of 2α6 = ?

Find the next term for the series given below: 5G, 6H, 7I, 8J , ?

In the following question, select the related number from the given alternatives.
AKP : 1121256 : : LNO : ?

Find the missing number?

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

Select the related word/letters/number from the given alternatives.
66 : 36 : : 99 : ?

Select the appropriate combination of mathematical operators to be sequentially placed between the numbers given on the left of the following equation so that LHS = RHS.

5035 = 20