Coding and Decoding Questions

In a certain code language, "OPTIMIST" is written as "LKRNRGHG". How is "PESSIMIST" written in that code language?

If P denotes ÷ , Q denotes x, R denotes + and S denotes ­ then what is the value of 18Q12P4R5S6

If QUICKLY is coded as OSGAIJW, then how will HUE be coded as?

If 5 # 9 @ 7 = 52 and 3 @ 9 # 2 = – 89, then 7 # 6 @ 9 = ?

If "+" means "minus", "x" means "divided by", "÷" means "plus" and "-" means "multiplied by", then
76 x 4 + 4 – 12 ÷ 37 = ?

If REGAINS is coded as QDFZHMR, then how will PRY be coded as?

If ENTRY is coded as 98462 and STEADY is coded as 749312, then how is NEATNESS written in that code?

In a certain code language, '-' represents 'x', '÷' represents '+', '+' represents '÷' and 'x' represents '-'. Find out the answer to the following question.

9 ÷ 12 - 15 + 4 x 10 = ?