Coding and Decoding Questions

In a certain code language, "DISORDER" is written as "OSIDREDR". How is "PRACTICE" written in that code language?

In a certain code language, "VERBAL" is written as "KZAQDU". How is "CURIOUS" written in that code language?

If A denotes '+', B denotes '­', C denotes 'x' and D denotes '÷', then which of the following statement is true?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
24 x 6 - 8 + 2 = ?

In a certain code language, "TEACHER" is written as "6427341" and "MAN" is written as "825". How is "MERCHANT" written in that code language ?

In a certain code language, "REMOTE" is written as "KYSPGS" and "BRAND" is written as "IRDTC". How is "MOBILE" written in that code language?

If 18 x 12 = 206 and 19 x 22 = 408, then 23 x 36 = ?

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