Coding and Decoding Questions

If FHNPKMEG means GOLF, then what does RTSUHJBDJL stand for?

If + means ÷, ­ means x, x means ­ and ÷ means +, which of the following will be the value of expression 16÷8­4+2x4=?

If 19 $ 7 = 312 and 23 $ 9 = 448, then 31 $ 11 = ?

If 8%5 = 30, 9%2 = 70 and 1%4 = -30, then find the value of 2%5 = ?

If 8 θ 12 δ 6 = 60 and 13 θ 15 δ 11 = 74, then 18 θ 21 δ 15 = ?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
60 x 5 + 3 ÷ 24 - 6 = ?

If A=1, HAT=29, then PAN=?

If 6#30=5; 8#24=3; 7#28=4; then what is the value of 8#40=?