Coding and Decoding Questions

If 23$35 = 13, 3$5 = 8 then what is the value of 4$13 = ?

If x means +, + means ÷, − means x and ÷ means −, then 8x7−8+40÷2 = ?

If 27 (15) 33 and 41 (13) 53, then what is the value of 'A' in 26 (A) 35?

If in a code language 3456 = ROPE and 15526 = APPLE then 54613 = ?

If 2*10 = 6, 14*16 = 15 and 4*16 = 10, then find the value of 16*8 = ?

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

17 x 18 ÷ 30 - 20 + 14 = ?

In a certain code, 329 means 'you are bad', 419 means 'bad is good' and 195 means 'nothing is bad'. ___ represents 'good'.

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
550 x 22 - 24 + 3 = ?