Coding and Decoding Questions

If @ means +, # means -, $ means x and * means /, then what is the value of 16 @ 4 $ 5 # 72 * 8 = 

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

17 - 20 ÷ 25 x 6 + 10 = 12

If 18!10 = 4, 10!4 = 3 and 4!8 = -2, then find the value of 16!18 = ?

If 7Ω6 = 84, 8Ω7 = 112 and 8Ω4 = 64, then find the value of 3Ω4 = ?

Answer the questions based on the below information.

If '+' is 'x', '-' is '+', 'x' is '/' and '/' is '-' then 6 - 9 + 8 x 3 / 20

If 16#2 = 16, 12#6 = 36 and 6#1 = 3, then find the value of 4#4 = ?

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

15 x 4 + 10 - 10 ÷ 14 = 10

If 19!3 = 32, 13!4 = 18 and 12!2 = 20, then find the value of 17!3 = ?