Who has put forward the 'Law of

What is the code for ‘it’?

After interchanging the given two signs and two numbers, what will be the value of the following expression?

÷ and +; 6 and 25

   By Interchanging the given two numbers which of the following equation will be correct?

1 and 6

What will be the value of expression if the signs ‘(x)’ and ‘(+)’ are interchanged?

728 ÷ 13 x 20 ÷ 4 + 8 – 9

If '@' means '÷', '#' means ' X ', '$' means '+' and '%' means '-' then what would be the value of the expression given below?

If '+' means '-', 'X' means '+', '-' means '÷', and '÷' means 'X', then what is the value of the following expression? 120 - 10 + 60 X 5 ÷ 3 X 15

If 'A' means '×', 'B' means '÷', 'C' means '+', and 'D' means '-', then what will come in the place of '?' in the given expression?

If '$ means +',  '# means –,  '@ means ×' and  '* means ÷', then what is the value of  ' 16 $ 4 @ 5 # 72 * 8 ' ?

By interchanging the given two numbers (not digits), which of the following equations will be correct?

24 and 15