Coding and Decoding Questions

If a = x, b = / and c = +, find the value of 7a5c1b6

In this question, some equations are solved on the basis of a certain system. On the same basis find out the correct answer from amongst the four alternatives for the unsolved equation.

462 = 551
398 = 487
856 = ?

 In a certain code language, “PRANK” is written as “RUESQ”. How is “RATES” written in that code language?

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

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

In a certain code language, '-' represents '+', '+' represents 'x', 'x' represents '÷' and '÷' represents '-'. Find out the answer to the following question.

13 - 14 + 15 x 70 ÷ 14 = ?

If 'HARBOUR' is written as 'IBSCPVS' , how is 'HABITAT' written in that code?

If "#" means "subtraction", "&" means "division", "@" means "addition" and "%" means "multiplication", then 315&3#9@4%6 = ?