What is the purpose of World Wetlands

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

What will be the value of the given expression after the following interchanges?

Expression: 48 - 12 + 360 ÷ 6 X 4

If '÷' means '+', '+' mean '-', 'x' means '÷' and '-' means 'x', then what will be the value of the given expression:

12 – 6 x 2 + 5 ÷ 9

If ‘%’ means (÷), ‘#’ means (-), ‘@’ means (×), and ‘&’ means (+), then what is the value of the expression:

Select the correct combination of mathematical signs that can sequentially replace the ‘*’ signs and balance the given equation.

If ‘%’ means (÷), ‘#’ means (-), ‘@’ means (×), and ‘&’ means (+), then what is the value of the expression:

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

Select the number from among the given options that can replace the question mark (?) in the following series.

24, 35, 51, 73, 102, ?