Verbal Reasoning - Mental Ability Questions

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

50 + 3 ÷ 125 x 5 - 25 = ?

In the following question, select the related number from the given alternatives.
9143 : 9963 : : 6731 : ?

A is D's brother. D is B's father. B&C are sisters. How is C related to A?

If 'P 3 Q' means 'P is daughter of Q', 'P 5 Q' means 'P is father of Q', 'P 7 Q' means 'P is mother of Q' and 'P 9 Q' means 'P is sister of Q', then how is J related to K in J 3 L 9 N 3 O 5 K?

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

11, 121, 1331, 14641, ?

Raj is facing north. He cycles for 8 km, then turns towards the south-east direction to move 10 km and from there, he moves 6 km towards the west. In which direction/place is he from his original position?

Spandana is the sister of Raju. How is Raju's father's sister related to Spandana?

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