Coding and Decoding Questions

If BLACKSMITH is coded as CNBELUNKUJ, then CHILDREN 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?

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?

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

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 = ?