Coding and Decoding Questions

If 19#13=3; 25#3=11; 36#10=13; then what is the value of 7#3=?

If "*" denotes "added to", "&" denotes "divided by", "@" denotes "multiplied by" and "%" denotes "subtracted from", then 136 & 8 @ 7 % 3 * 7 = ?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?

80 + 2 ÷ 25 + 5 - 10 = ?

If 9*4 = 26, 4*4 = 16 and 3*6 = 18, then find the value of 5*2 = ?

In the question, a word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as in two matrices given below. The columns and rows of Matrix I are numbered from 0 to 4 and that of Matrix II are numbered from 5 to 9. A letter from these matrices can be represented first by its row and next by its column, e.g., G can be represented by 04, 40, etc., and 'K' can be represented by 56, 75, etc. 

Similarly you have to identify the set for the word 'NILE'.

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

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

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?

15 - 5 + 25 ÷ 10 = ?