Coding and Decoding Questions

If 23@5=56; 6@7=26; 5@2=14; then what is the value of 7@5=?

In a certain code language, "NATURE" is written as "TANURE". How is "LISTEN" written in that code language?

If SUN = 108, MOON = 114. What is STAR = ?

If C is coded 3 , DASH is coded as 32 , then DANCE will be coded as

If "α" denotes "subtracted from", "β" denotes "multiplied by", "θ" denotes "added to" and "δ" denotes "divided by", then 10 θ 8 β 4 δ 8 α 9 = ?

If 8α9 = -72, -9α3 = 27 and -6α1 = 6, then find the value of -3α6 = ?

If "A" means "plus", "B" means "divide", "C" means "multiply" and "D" means "minus", then 187 B 17 C 4 A 7 D 17 = ?

In a certain code language, "RUMOUR" is written as "MURRUO". How is "RACKET" written in that code language?