Coding and Decoding Questions

In a certain code language, “TRUCKS” is written as “WPXANQ”. How is “MOPERS” written in that code language?

In a certain code, if DOG is written as 4157, then what will MAT be written as ?

If "-" means "plus", "x" means "divided by", "÷" means "multiply" and "+" means "substraction", then

If mathematical operators '-' and '/' are interchanged, then the value of 15 x 4 ÷ 15 - 11 x 33 ÷ 98 is

If 3#5 = -20, 1#4 = -30 and 6#5 = 10, then find the value of 4#9 = ?

 In a certain code language, “POLIS” is written as “SROLV”. How is “MRUGS” written in that code language?

If BOULDER is coded as ZMSJBCP, then how will ELK be coded as?

If 5Δ1 = 40, 9Δ9 = 0 and 7Δ1 = 60, then find the value of 4Δ9 = ?