Coding and Decoding Questions

If in a certain language, STRING is coded as TSIRGN, how is RANDOM coded in that code?

If 9@7=4; 6@1=10; 7@4=6; then what is the value of 8@2=?

If CHANTED is coded as ZEXKQBA, then how will MAY be coded as?

In a certain code language, “RINKS” is written as “SKOMT”. How is “FRIED” written in that code language?

If in a certain code, GREEN is written as ITGGP, then how will OINK be written as in the same code?

If "#" means "subtraction", "&" means "division", "@" means "addition" and "%" means "multiplication", then 217 & 7 # 3 @ 2 % 7 = ?

If '+' means '÷', '÷' means '­', '­' means 'X' and 'X' means '+', then 48 + 16 x 4 ­2 ÷ 8 = ?

In a certain code language, “FRONT” is written as “618151420” and “BORNE” is written as “21518145”. How is “MORNS” written in that code language?