Coding and Decoding Questions

If FRIEND is coded as HTKGPF then REVEAL will be coded as:

In a certain code language, "DESIRE" is written as "EGVMWK". How is "RECESS" written in that code language?

If 45 % 11 = 7, 59 % 34 = 7 then what is the value of 55 % 4 = ?

In a certain code language, "TIRED" is written as "56" and "BRAIN" is written as "44". How is "LAZY" written in that code language?

If BROTHER is coded as GWTYMJW, then SCHOOL is coded as

In a certain coded language, 'hit ka tom' is written as 'tie the shoes', 'ka lo fod' is written as 'shoes of leather' and 'lo tin lot' is written as 'leather and raxin'. How is 'of' written in this code language?

In a certain code language, "BORROW" is written as "769965" and "BOMB" is written as "7647". How is "WOMB" written in that code language?

If "+" means "minus", "x" means "divided by", "÷" means "plus" and "-" means "multiplied by", then
300 x 10 – 5 + 36 ÷ 57 = ?