Coding and Decoding Questions

In a certain code language, "CERTAIN" is written as "DFSTBJO". How is "CRICKET" written in that code language?

Some equations have been solved on the basis of certain system. Find the correct answer for the unsolved equation on that basis. If 98-39-27=31, 87-38-34=20, then 79-25-12 = ?

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

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

If 'how are you' is written as 'ne ki se' and 'where are you' as 'ne bl se' and 'you were here' as 'ke ne jo', then 'how you here' is written as

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

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

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