Verbal Reasoning - Mental Ability Questions

If 8 θ 12 δ 6 = 60 and 13 θ 15 δ 11 = 74, then 18 θ 21 δ 15 = ?

In the following question, select the related number group from the given alternatives.
19 : 367 : : ? : ?

In the following question, select the related letters from the given alternatives.
PRAG : QTDK : : STOP : ?

Select the related number from the given alternatives.
12.5 : 6.25 :: 7 : ?

In the following question, select the related letters from the given alternatives.TRACK : MECTV : : POND : ?

A has more money than E but less of that than B. C has more money than D but less of that than E. Who among them is the richest?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?

75 - 5 + 25 ÷ 125 = ?

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