Coding and Decoding Questions

If in a certain language TEACHER is coded as QBXZEBO, then how is STUDENT coded in the same language?

If "A" denotes "added to", "B" denotes "divided by", "C" denotes "multiplied by" and "D" denotes "subtracted from", then 116 B 29 C 6 A 24 D 45 = ?

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

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

If L denotes 'x', M denotes '÷' , P denotes '+' and Q denotes '-'  then 16P24M8Q6M2L3

If the number 1 on the clock is replaced by the letter M, the number 2 is replaced by N and so on, then when the time is 21:00 p.m. the hour hand will be at ____ letter

If x means +, + means ÷, − means x and ÷ means −, then 8x7−8+40÷2 = ?