Coding and Decoding Questions

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

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

14 + 18 x 40 - 10 ÷ 20 = 66

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

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

16 ÷ 4 x 8 - 10 + 14 = 12

If S means '+', L means 'x', U means '/' and K means '-', then the value of

21 S 1 U 7 L 15 U 6 L 14 K 55

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

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

24 + 4 - 20 ÷ 9 x 5 = 31

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