Coding and Decoding Questions

In a certain code language, “CUDGEL” is written as “FYGKHP”. How is “DAINTY” written in that code language?

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

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

In a certain code language, "DIAMOND" is written as "4895064" and "GAME" is written as "7953". How is "MANGO" written in that code language?

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

In a certain code language, “book is tough” is written as “fu la mi”, “tough can easy” is written as “fu muk po” and “easy not book” is written as “ti po la”.What is the code for “tough” in that code language?

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

If SYSTEM is written as RXRSDL.
How can CORRECT be written in that code?