In the given figure PQRS is a square and OQR is an

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

72 # 91 $ 7 & 4 @ 18

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

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

38 ÷ 26 – 2 + 5 × 4 = 45

If A $ B means A X B, A € B means A ÷ B, A & B means A + B and A @ B means A - B, then what is the value of '178 & 100 € 25 @ 18 $ 4 & 22'?

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

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

30 * 4 * 2 * 1 * 121

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

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

If A # B means A - B, A @ B means A ÷ B, A * B means A + B and A % B means A X B, then what is the value of ‘140 @ 28 * 22 % 4 # 30?