Every year the World wetland Day is celebrated on

Which among the given operators should replace the “%” (in the same order) in the given expression below:

6 % 11 % 6 % 37 % 30 % 7

If 'A' stands for '+', 'B' stands for '-', 'C' stands for ' X ', 'D' stands for '÷', what will come in the place of (?) in the following equation?

If '+' means '-', '×' means '+', '-' means '÷', and '÷' means '×', then what is the value of the following expression?

 If ‘ > ’ means ‘plus’, then ' 55 > 24 $ 4 < 8 % 6 ' = ?

If '+' means '÷', '-' means ' X ', ' X ' means '+', '÷' means '-', what will come in place of the question mark(?)?

Which of the following “signs” are placed in place of “symbols” given in the equation to make the equation true?

What will be the value of expression if the numbers/digits ‘(30)’ and ‘(13)’ are interchanged?

78 ÷ 30 × 6 + 13 - 14 + 12