Coding and Decoding Questions

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

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

If SQUALOR is coded as USWCNQT, then how will WHY be coded as?

If 6 * 9 – 4 = 58 and 3 * 9 – 7 = 34, then in the expression A * 4 – 9 = 91, what is the value of 'A'?

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

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

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

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