Coding and Decoding Questions

If, 6x4= 12, 4x12= 24, 12x6= 36 then 6x9= ?

If + means ÷ , ÷ means ­- , ­- means x and x means + , what will be the value of the following expression:

8 + 4 ÷ 3 x 5 ­ 9 = ?

If "A" denotes "added to", "C" denotes "divided by", "D" denotes "multiplied by" and "B" denotes "subtracted from", then
81 C 9 D 11 B 4 A 6 = ?

If WORK = 7935, ROCK = 3587 and WART = 1945, which digit stands for T?

If 80&10 = -8, 50&2 = -25 and 80&16 = -5, then find the value of 20&5 = ?

If 'x' means 'addition', '­' means 'division', '/' means 'subtraction' and '+' means 'multiplication', then which of the equation is correct

If "*" denotes "added to", "&" denotes "divided by", "@" denotes "multiplied by" and "%" denotes "subtracted from", then 399 & 19 @ 21 % 41 * 100 = ?

If MACHINE is coded as 19-7-9-14-15-20-11, how will you code DANGER?