Which of the following gases is also known as a

Which two signs should be interchanged to make the given equation correct?

8 – 32 + 20 × 15 ÷ 3 = 271

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

24, 35, 51, 73, 102, ?

If ‘A’ means (÷), ‘B’ means (×), ‘C’ means (+), and ‘D’ means (-), then what is the value of the expression:

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

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

80 % 110 & 5 @ 9 # 104

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

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

If ‘÷’ means ‘-’, ‘-’ mean ‘+’, ‘+’ means ‘×’ and ‘×’ means ‘÷’, compute the value of the expression: