Verbal Reasoning - Mental Ability Questions

Select the related letters from the given alternatives.
WUS : DFH :: MKI : ?

Select the related letters from the given alternatives.
DFI : ACF :: OQT : ?

In the following question, select the related letters from the given alternatives.
KLMN : IJKL : : TUVW : ?

Choose the related word/letters/number from the given alternatives.
Nest : Bird : : Den : ?

If "#" means "subtraction", "&" means "division", "@" means "addition" and "%" means "multiplication", then 315&3#9@4%6 = ?

A man walks 7 km towards south and turns to the left. After walking 5 km, he turns to the right and walks 7 km. In which direction is he now from the starting point?

If 6#30=5; 8#24=3; 7#28=4; then what is the value of 8#40=?

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

75 - 5 + 25 ÷ 125 = ?