Coding and Decoding Questions

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

If 15@7=44; 5@4=18; 6@17=46; then what is the value of 17@4=?

In a certain code language, “MAGNET” is written as “WHQJDP”. How is “FRAUDS” written in that code language?

If A = 1, E = 5, then HEAR = ?

If 70*10 = -7, 50*5 = -10 and 10*5 = -2, then find the value of 80*1 = ?

If in a certain language TEACHER is coded as QBXZEBO, then how is STUDENT coded in the same language?

If MOMENTUM is coded as EMOMNTUM , then MAGNETIC will be coded as?

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