Coding and Decoding Questions

Which one of the following interchanges in signs and numbers would make the given equation correct?

3 + 5 - 2 = 4

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?

4 - 10 ÷ 5 x 4 + 12 = 16

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

14 + 8 ÷ 16 - 9 x 12 = 10

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

16 x 4 - 10 + 2 ÷ 12 = 18

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

5 + 8 ÷ 40 - 20 x 25 = 6

If 40@8 = 50, 30@3 = 100 and 10@2 = 50, then find the value of 20@5 = ?

If the mathematical operator '/' means 'x', '+' means '-', 'x' means '+' and '-' means '/', then

24 + 48 - 12 x 4 / 2 = ?