Coding and Decoding Questions

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?

80 x 16 ÷ 4 + 2 - 8 = ?

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

In these questions, the relationship between two elements is shown in the statements. These statements are followed by two conclusions.
Statement:
A = M >P, N > R, A > T
Conclusion:
I. T = P
II. R < A

In a certain code language, “MAGNET” is written as “WHQJDP”. How is “FRAUDS” written in that code language?

Some equations have been solved on the basis of certain system. Find the correct answer for the unsolved equation on that basis. If 98-39-27=31, 87-38-34=20, then 79-25-12 = ?

If in a certain language TEACHER is coded as QBXZEBO, then how is STUDENT coded in the same language?

If "S" denotes "multiplied by", "V" denotes "subtracted from", "M"denotes "added to" and "L" denotes "divided by", then

96 L 12 S 7 V 49 M 10 =?

If x means +, + means ÷, − means x and ÷ means −, then 8x7−8+40÷2 = ?