In a certain code language, '-' represents 'x', '÷' represents '+', '+' represents '÷' and 'x' represents '-'. Find out the answer to the following question.
15 - 6 + 10 x 3 ÷ 2 = ?

One evening, Raja started to walk toward the Sun. After walking a while, he turned to his right and again to his right. After walking a while, he again turned right. In which direction is he facing? 

Direction: In the following question, select the related letters from the given alternatives. 

LMN : QPO :: OPQ:?

Select the letters related to the given words.
AZBZ : CYDY :: EXFX : ?

Two statements are followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they do not conform to real-word knowledge, decide which of the conclusion(s) logically follows from the statements.

Statements:

All ponds are pools

Some wells are ponds.

Conclusions;

I. Some ponds are not wells.

II. Some wells are pools

III. All pools are wells.

Light : Darkness:: Knowledge?

Direction: In the following question, select the related letters from the given alternatives.
Energy: Joule :: Volume : ?