Find the mean deviation of

If 'P' stands for '+', 'Q' stands for '×', 'R' stands for '-', and 'S' stands for '÷', then what is the value of the following expression?

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

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

Expression: 324 + 22 - 7 X 4 ÷ 36 - 28

If ' + ' means ' × ', ' - ' means ' ÷ ', ' × ' means ' - ' and ' ÷ ' means ' + ' then 18 × 9 ÷ 3 + 8 - 4 = ?

In the following question, select the related number from the given alternatives.

22 : 330 :: 28 : ?

Select the correct combination of mathematical signs that can sequentially replace the “@” sign and balance the following equation.

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

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

Which two digits and signs can be interchanged so as to balance the given equation?

406- 102 + 128 X 5 ÷ 58 = 545