Coding and Decoding Questions

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

If A = 26 and X-RAY = 40, then WHAT = ?

In a certain code language, “MAYOR” is written as “NBZPS”. How is “PLAYER” written in that code language?

If "x" denotes "added to", "÷" denotes "subtracted from", "+" denotes "divided by" and "–" denotes "multiplied by", then 14 x 12 – 16 ÷ 18 = ?

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

If 52 % 32 = 40, 22 % 20 = 4 then what is the value of 15 % 11 = ?

If 5@1=60; 12@8=200; 16@2=180; then what is the value of 16@10=?