Coding and Decoding Questions

In a certain code, 327 means 'don't cut tree', 635 means 'plant one tree', 138 means 'tree gives shade' and 4953 means 'we must plant tree'. Which digit represents 'shade'?

If LOW is coded as 468, BOW as 768, and SOWS as 3683, then the code of BOWLS is

If in a certain code language, PROMOTION is written as 365458957, how will the word MONITOR be written in that code language?

In a certain code language, “TURTLE” is written as “RRNRIA”. How is “LOYALS” written in that code language?

If P denotes '÷', Q denotes 'x', R denotes '+' and S denotes '­', then 18Q12P4R5S6 = ?

 In a certain code language, “POLIS” is written as “SROLV”. How is “MRUGS” written in that code language?

In a certain code language, “MOTOR” is written as “ORXTX”. How is “GUARD” written in that code language?

If "-" means "plus", "x" means "divided by", "÷" means "multiply" and "+" means "substraction", then