Coding and Decoding Questions

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

25 ÷ 2 - 10 + 10 x 6 = ?

If 18α12 = 3, 2α14 = -6 and 4α4 = 0, then find the value of 2α16 = ?

In a certain code language, “MUTE” is written as “60” and “TYRE” is written as “69”. How is “HYPE” written in that code language?

In a certain code, 'book is big' is written as 756; 'big is story' is 764 and 'story book is interesting' is 4356. Which digit represents 'interesting'?

If in a certain code, UNGIMMICKY is written as MIGNUYKCIM, then how will COMPLEXITY be written as in the same code?

In a certain code language, “FUNGI” is written as “HYPKK”. How is “ALGAE” written in that code language?

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

If BORDER is coded as 579649, then ORDER can be coded as