Coding and Decoding Questions

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

In a certain code language, "HAMMER" is written as "MAHERM". How is "MATTER" written in that code language?

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

If '­' means 'x' , 'x' means '+' , '+' means '÷' and '÷' means '­' , then what will be the value of 40 x 12 + 3 ­ 6 ÷ 60 = ?

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

If "#" means "subtraction", "&" means "division", "@" means "addition" and "%" means "multiplication", then 505 & 5 # 4 @ 20 % 5 = ?

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

In a certain code language, “LAND” is written as “33” and “TURN” is written as “75”. How is “MALE” written in that code language?