Coding and Decoding Questions

If the mathematical operators, 'x' means '+', '/' means 'x', '+' means '-', and '-' means '/', then 22 + 36 - 12 x 6 / 4 = ?

If 7*7 = 140, 6*1 = 70 and 3*5 = 80, then find the value of 4*4 = ?

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

18 + 26 - 25 x 10 ÷ 5 = 42

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

Select the missing term based on the given related pair of terms.

COULD : BNTKC :: MOULD : ___

If 3!5 = 30, 6!1 = 12 and 5!8 = 80, then find the value of 2!2 = ?

If 'W' means 'x', 'X' means '-', 'Y' means '+' and 'Z' means '/', then 28 Z 7 W 8 X 6 Y 4 = ?

If 20&60 = 8, 40&80 = 12 and 10&20 = 3, then find the value of 20&50 = ?